Birch Plywood Hydraulic Grabber Arm STEM Kit, 64 Pieces
Birch Plywood Hydraulic Grabber Arm STEM Kit, 64 Pieces
Push a syringe, and the claw closes. This hydraulic arm kit lets older kids build a birch plywood grabber arm on a turntable base, then connect four syringes with blue vinyl tubing filled with water. Each syringe drives one joint, so kids discover the same pressure trick that powers diggers and cranes. Then the candy-grabbing contests begin.
What Makes It Fun
- Material: Birch plywood, plastic syringes, vinyl tubing
- Color: Natural wood with blue tubes
- Water-powered arm with 4 moving joints
- Learn how hydraulics move heavy machines
- Syringes and tubing included, just add water
- Screws and pegs are small parts
Age & Safety
Recommended age: Ages 10+. Screws and pegs are small parts. Age-honest is one of our promises, so the grade is right here on the page.
What's in the box: 64 pieces including plywood parts, syringes and vinyl tubing.
WARNING: CHOKING HAZARD – Small parts. Not for children under 3 yrs.
Care
Supervise the build and the water-filling. After play, empty the syringes and tubing and let them dry; wipe the plywood with a dry cloth and never soak it.
Shipping & Returns
We ship with tracking on every order and leave the price slip out, so it's ready to wrap. Complete or replaced: if anything is missing or broken, we send the part free. Details are in our Shipping Policy and Refund Policy.
FAQ
What does it need besides the kit?
Just water. The syringes and tubing are included.
Is this a solo project for a ten-year-old?
Many kids 10 and up can build it alone; a grown-up helps with filling the tubes without spills.
Shipping, returns & care
Flat $5.95 on U.S. orders; free on orders of $60 or more. We ship within United States only.
Orders are packed within 1–2 business days. Delivery normally takes another 3–7 business days, with a tracking link emailed to you. Full details on our Shipping Policy.
This toy contains small parts or batteries — please follow the age grade on the box.
You have 30 days from delivery to return any unopened item in its original sealed packaging. Buyer pays return postage on change-of-mind returns; damaged, wrong or lost orders are replaced or refunded in full and we cover the postage. No restocking fees.
Approved refunds go back to your original payment method within 5–10 business days. See the full Refund Policy.
Check the age grade on the product page before buying. Toys with small parts, magnets or batteries are not for children under 3 and should be used with adult supervision. Keep packaging until you are sure the toy is right — unopened items are returnable for 30 days.
Email support@kitesoftheharbor.com or use our contact form. A real person at our shop in Sag Harbor, NY reads every message, Open daily 9 AM – 8 PM ET — usually answered within one business day.