SMIESSKIDDO 3 in 1 Hydraulic Robot Arm - 220 Pcs STEM Building Toys with 4-Jaw Grab, Suction & Tongs for Kids 8-12 | No Batteries Needed Engineering Gift for Boys & Girls Ages 9 10 11
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Availability:
20 left in stock
Arrives
Sep 24 – Sep 25
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Features
- 3-in-1 STEM Adventure: Build 4-Jaw Grab Bucket, Suction Cup and Tongs Grab with one hydraulic robot arm kitno batteries, motors or glue required! Perfect for ages 8+ to explore engineering, physics and creativity
- Brain-Boosting Fun for Curious Kids: Boost problem-solving skills, focus and STEM knowledge through hands-on assembly (3-5 hours). Ideal for classrooms, playrooms or family bondingwherever kids love to tinker
- Ambidextrous & Ultra-Safe Design: Kid-friendly, non-toxic materials and intuitive building pieces make this robotic arm a worry-free gift for birthdays, holidays or budding engineers aged 7-12
- Outsmart Screen Time: Inspired by classic erector sets but coolerhydraulic power teaches mechanics effortlessly. Watch kids beam with pride as they lift, grip and learn like real scientists
- Gift for Future Innovators: Crush the competition with our 3-in-1 versatility and focus on STEM confidence. Guaranteed to spark "Whoa, I built that!" moments
Product Dimensions: 4.13 x 11.61 x 15.94 inches
Item Weight: 2.66 pounds
Item model number: YYB0102
Manufacturer recommended age: 3 years and up
Manufacturer: SMILESSKIDDO
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 24 – Sep 25
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This STEM hydraulic robotic arm building toy kit has been a great experience so far and we haven't even finished building it. It says it's for 8+ years old but I'm building it with my boy who just turned 6. It's a good way for him to develop his reading and hand and motor skills even further. He's also interested in the subject matter, a hydraulic robotic arm, which helps retain his interest in building it. We build for an hour or so and come back to it. I would say it's suitable for ages younger than 8+ if supervised by an adult. I haven't had to do much more than help direct him through the steps, he's built 95% it himself with his own hands. It could be built quicker, but the pieces are all connected together with those tabs you have to twist to break the pieces out of. We're actually taking the time to trim the little burrs off so the build ends up looking smoother and cleaner. We weren't going to at first but there's a spot we got to early on in the assembly process where those little burrs were getting in the way. But I'm glad it happened because now we can take our time and build it even nicer and that's also a good skill to work on with a child. It's tedious but interesting, the instructions haven't been difficult to follow, and the pieces are all marked and numbered in grids of parts. A, B, C, D, E, F, G and so on, with parts numbered 1- and so on. The instructions will tell you that you need piece A-12 and connect it to this or that, and so on. Straightforward and easy to follow, our kid is getting the hang of it as well. Again, this says 8+, so your results may vary but we spend a lot of one on one time with our kid and he's pretty sharp so other than him maybe getting distracted from time to time like kids do, he's been able to focus and really enjoy this. We're looking forward to the finished result and considering another STEM kit like this in the future.
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Reviewed in the United States on August 5, 2025 by Greg Stephens Greg Stephens
I purchased this hydraulic robot arm kit for my son's 9th birthday, and it was an absolute home run. He is very interested in robotics and has a club at his school, so I was looking for a gift that would be both fun and educational, and this delivered perfectly. The best part was seeing his reaction when he opened it at his birthday party. He and his friends immediately dove in and started building it together. It was fantastic to see a group of 9-year-olds so focused and collaborating on a project. It became a highlight of the party. I was a little worried the build might be too complex, but the instructions were surprisingly clear. They are picture-based, and as long as you pay attention to the part numbers and orientations shown, it's very manageable. While some building kits require tools to remove the plastic pieces from their frames, we didn't need any. The boys were able to carefully twist the pieces off by hand without any issues or sharp edges. The finished product is a lot of fun and has a real "wow" factor, especially since it needs no batteries. The boys love operating the controls and seeing how the water pressure creates movement. For the price, the amount of engagement and genuine STEM learning this provides is an excellent value. Overall, this is a fantastic kit. It was the perfect gift for our robotics-loving son, and I would highly recommend it to any parent looking for a hands-on, screen-free project that truly gets kids excited about engineering.
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Reviewed in the United States on August 7, 2025 by Kerry Kerry
What an absolute winner this hydraulic robot arm turned out to be! At $39.99, this 220-piece STEM kit delivers incredible value for the engineering education it provides. My kid was completely absorbed for hours building this thing, and honestly, I found myself getting pulled into the project too—there's something deeply satisfying about watching hydraulic power come to life without a single battery in sight. The three different grabbing modes (4-jaw bucket, suction cup, and tongs) kept the excitement going long after assembly was complete. The instructions were surprisingly clear for a kit this detailed, and the quality of the plastic pieces exceeded my expectations. Everything fits together smoothly, and the finished product feels sturdy enough to withstand enthusiastic play sessions. I particularly appreciated the ambidextrous design since we have both righties and lefties in our house. What really impressed me was how naturally this kit sparked genuine curiosity about hydraulics, physics, and engineering principles. The kid started experimenting with different objects to grab and asking thoughtful questions about how the hydraulic system creates force. It's rare to find a toy that delivers this much educational value while still being genuinely fun to use. The 3-5 hour build time was perfect for a weekend project that didn't drag on too long or end too quickly. This is a perfect gift for girls and boys, and hopefully helps the kiddos fall in love with learning. I hope this review has been helpful to you!
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Reviewed in the United States on August 3, 2025 by Tuxedo Traveler Tuxedo Traveler