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Please pay first, then WhatsApp to book time. Strictly No Walk-ins. Non-refundable.
7-9 years old
Birthday gift
Programmable robots and DIY
[Pick up in Kwun Tong] byjarda scientific assembly experiment three-in-one STEM hydraulic manipulator
Regular price
$949.00
Sale price
$679.00
Discount28%
Details →
Skills Developed:
Fine motor skills
, Mathematical Logic
and Spatial geometry
- Three-in-one hydraulic robotic arm design
- Water pressure driven, no motor or battery required.
- Develop logical thinking skills and explore scientific principles
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⚠️ Pick-Up Only (No Delivery) — Must book after payment.
[Pick up in Kwun Tong] byjarda scientific assembly experiment three-in-one STEM hydraulic manipulator
Sale price
$679.00
Regular price
$949.00
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[Self-collection in Kwun Tong] byjarda STEM Hydraulic Robotic Arm: The Ultimate Educational Toy for Exploring the Mysteries of Physics (3-in-1)
This 3-in-1 hydraulic robotic arm from byjarda is a deep STEM building set designed for young engineers who love science and engineering. It completely eliminates the need for batteries and motors, utilizing purely hydraulic transmission principles to convert water pressure into powerful mechanical force. More than just a toy, it's a vivid physics lesson, allowing children to deeply understand the mysteries of fluid mechanics and mechanical structures through hands-on assembly.
🔧 Assembly difficulty: Extremely challenging (5/5 - suitable for children aged 8 and up with patience and concentration; parental involvement is strongly recommended for collaborative creation).
🌟 Core Product Features: Pure physical power, limitless creative possibilities
1. Zero-electricity operation, environmentally friendly and scientific:
No motor or batteries are needed; it only requires water to operate. Through five precision levers at the back of the arm, children can feel how liquid pressure drives the mechanical joints, experiencing the most primal and magical scientific power.
2. Three-in-one function can be freely switched:
This robotic arm offers high playability, allowing users to switch between three different end effectors at any time to suit their experimental needs: a gripper chuck (suitable for gripping solids), a bucket chuck (suitable for digging or moving small parts), and a powerful suction cup head (suitable for adsorbing objects on smooth surfaces).
3. Six-axis joint design, flexible and lifelike:
Simulating the motion logic of a real industrial robotic arm, it features six movable axes, supporting rotation, lifting, lowering, bending, and extension. Its sophisticated structure can support the grasping of objects weighing up to 100g, allowing children to simulate factory automation operations at home.
🧠 Integrating international STEAM education concepts
This product deeply integrates Science, Technology, Engineering, Arts, and Mathematics .
- Science and Engineering: Learn Pascal's Law and understand how pressure is transmitted in a closed container.
- Logic and Problem Solving: Facing the assembly of complex parts, children develop logical thinking and patience, and learn how to solve structural problems by following diagrams.
- Creative inspiration: Includes DIY stickers, allowing children to unleash their imagination and decorate a unique, personalized robotic arm.
📊 Product Specifications
| project | Specifications/Quantity |
|---|---|
| Applicable age | 8 years or older |
| Main materials | Safe and environmentally friendly ABS plastic |
| Robotic arm base size | Approximately 28cm (excluding arm length) |
| Packaging box size | 40.5 x 10.5 x 30 cm |
| Maximum load | Approximately 100g |
| Range of motion | Base 270° / Shoulder 45° / Elbow 40° / Wrist 180° Rotation |
| Place of origin | made in China |
🛠️ Essential Assembly Tools Checklist
To ensure a smooth assembly process and a stable finished product, parents should help their children prepare the following tools (tools are not included in this product):
| Required tools | Instructions for use |
|---|---|
| Diagonal pliers | Precisely remove parts to avoid burrs affecting structural operation. |
| Phillips screwdriver | Fixed mechanical structure and base |
| Scissors | Cutting hydraulic lines |
| tissue | Clean up any water droplets that overflowed during the water filling process. |
| markers | Mark pipeline or part numbers |
| Measuring tape or ruler | Measure pipeline length |
| water cup | Water required for hydraulic system |
Customer Notice and Disclaimer
- Product composition and specifications: All product composition, dimensions, weight and specifications are subject to the actual product. Product effects (such as intellectual development, stress relief, etc.) vary from person to person.
- Origin and Packaging: This product may be "Made in China". The packaging or instruction manual may contain simplified Chinese. Please consider this before purchasing.
- Dimensional tolerances: Since all dimensions are measured manually, there may be a small reasonable tolerance (+/- 1-3cm), and there may be minor errors. Please refer to the actual product.
- Color difference notice: All pictures are taken from real objects. Due to differences in shooting light, monitor resolution and individual understanding of color, there may be slight color differences from the actual product. Please refer to the actual product.
- Safety Warning: This product may contain small parts and is not suitable for children under 3 years old. Please use under adult supervision.
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Free Shipping over $400
Free door-to-door delivery on orders over HK$400 (excluding residential/remote areas).
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Premium Gift Wrapping & Card Writing
Premium Gift Wrapping Service
Special gifts deserve exquisite packaging services.
We provide a full range of toy gift wrapping services, adding a beautiful touch and a handwritten card to your carefully selected STEM toys.
Warm wishes, beautifully presented. Make important moments full of smiles and make children even happier!
Exquisite Gift Wrapping
Using high-quality wrapping paper and ribbons, wrapped by hand to make the unboxing moment full of ritual.
Handwritten Greeting Card
We write your blessings for you, turning warm wishes into words delivered with the gift.
Billing for Multiple Items Instruction
This service is charged per 'toy item count'. Please add the quantity corresponding to the number of items you need wrapped.
We will provide individual packaging for each selected toy.
💡 Example: If you buy 3 toys and need all of them wrapped, please set the quantity to 3.
Shipping Policy & Delivery Info
Shipping & Delivery
Shipping Fees & Free Shipping
- Enjoy Free Delivery on orders over $400.
- Free shipping coverage: Single delivery location, including residential/commercial addresses, SF Stores, and EF Lockers.
- For orders under $400, a shipping & handling fee of $60 will be charged.
- SF Express Network:
Remote Area Surcharge
- An extra $10 fee applies to the following areas:
Sai Kung, Clear Water Bay, Shek O, Stanley, Discovery Bay, Ma Wan, Cheung Chau, Lamma Island, Peng Chau, South Lantau (including Tai O, Tong Fuk, Cheung Sha, Mui Wo, Pui O, etc.).
- Other remote area service & surcharge details: Click here for details.
- Note: Additional service fees may apply for remote areas. Please refer to SF Remote Area Table.
Delivery Time & Schedule
- General Delivery Service: Mon-Fri only (Hong Kong).
- Processing Time: 2-4 days after ordering.
(Cut-off time: Mon-Fri 16:00) - Transit Time: Approx. 5-7 days via courier.
- Actual delivery time depends on stock availability. Incorrect information may delay delivery.
Delivery Scope & Addresses
- Each order can only be delivered to one address. Please place separate orders for multiple locations.
- PO Boxes are not accepted as delivery addresses.
- No Delivery: Outlying Islands (except Airport, Ma Wan, Discovery Bay, and Tung Chung) and any restricted areas.
- Please contact Kidrise immediately if you need to change the address.
Tracking & Receipt
- We will provide a Tracking No. after the item is dispatched.
- To change the address after dispatch, please contact the courier directly. Extra fees are borne by the customer.
- Orders may be cancelled without refund if delivery fails multiple times due to personal reasons.
- Door-to-door delivery does not include moving items inside the residence. Kidrise is not responsible for any damage during moving.
Severe Weather Arrangements
- Delivery will be suspended when Typhoon Signal No. 8 or higher, or Red/Black Rainstorm Warnings are hoisted.
- Delivery will also be suspended if weather conditions are deemed unsafe by the courier.
- Kidrise will contact you to reschedule the delivery.
Educational STEM Toy Birthday Gift Guide
Struggling to find the perfect birthday gift? Kidrise has selected a variety of popular birthday gifts for children!
We feature Montessori toys for ages 0-3, as well as STEM toys for ages 3+,
covering the four major fields of Science, Technology, Engineering, and Mathematics.
Combined with our exclusive discounts, let's make it a memorable birthday for your little one!
How to Choose Age-Appropriate Toys?
Struggling to find the right toy or birthday gift? Kidrise has the perfect guide for you!
Toys are essential partners for children to learn while playing. Regardless of the type, they hold educational value.
However, choosing toys that do not match a child's age may lead to disinterest or safety concerns.
Kidrise Expert Advice:
Match the child's developmental age (intelligence, motor skills, and physical ability). Choosing 'slightly challenging' toys can better stimulate a child's potential.
Match the child's developmental age (intelligence, motor skills, and physical ability). Choosing 'slightly challenging' toys can better stimulate a child's potential.
Toy Age Guide & Categories
0-3 Yrs
Early Learning & Montessori
View Collection3-6 Yrs
STEM Educational Toys
View Collection6-11 Yrs
STEM Science Experiments
View Collection11+ Yrs
Advanced STEM Logic Toys
View CollectionReturn & Exchange Policy
Returns & Exchanges
Non-Exchangeable Items
- Bought by mistake / Changed mind after delivery.
- Product damaged by human error.
- Product has been opened or used (e.g., plastic wrap or box seal removed).
- Packaging is damaged, destroyed, or incomplete.
- Color difference due to lighting or screen settings (actual product prevails).
- Loss or damage caused by instructing courier to leave at door/management office.
Cancellation & Handling Fees
For order cancellations and refunds after payment, the following handling fees will be deducted:
Credit Card / AlipayHK / WeChat Pay
Deduct 5% or $30 (whichever is higher)
PayMe / Octopus / FPS / Bank Transfer
Deduct 3% or $20 (whichever is higher)
* We do not offer refunds without cause and reserve the right to refuse unreasonable requests.
Contact for Returns
Please prepare your order number and receipt, then contact us:
📞 Hotline: +852 6672 1884
📧 Email: contact@kidrise.com.hk
* If the item or quantity does not match the order, please contact us immediately on the day of delivery.
Return Rules & Process
- Timing: For quality issues, request an exchange within 7 days of receipt. Late requests will not be accepted.
- Return Deadline: Return the item to the service center within 3 days after the request.
- Proof: Must present the order number and original valid receipt.
- Limit: Only one exchange per order is allowed.
- Completeness: If operation is affected, return with full packaging and accessories; if only part is affected, only that part will be replaced.
- Shipping Fee: All shipping costs incurred for returns/exchanges are borne by the customer.
- Processing Time: Returns take 1-3 weeks (from the date of receipt).
- Refund Method: Refunds will be made to the original payment method (e.g., credit card), subject to bank processing time.
- Disclaimer: Kidrise is not responsible for damage after delivery. We are not liable for delivery failure/delay due to incorrect customer data.
- Returns due to size mismatch or change of mind are not accepted.
Other Terms
- We reserve the right to refuse any unreasonable return or exchange requests.
- Kidrise reserves the right to amend these terms without prior notice.
- In case of any dispute, Kidrise reserves the right of final decision.
Reminder:
Please read the product description and dimensions carefully before purchasing. Feel free to contact CS if you have questions.
Please read the product description and dimensions carefully before purchasing. Feel free to contact CS if you have questions.