KidzLabs 4M Hydraulic Robot Arm Kit

I like that you have to use screws to attached the parts instead of glue. I've purchased similar products I the past that used glue to attach to the balsa wood but the product didn't stay together long.

This was a Christmas gift for my eight year old son. He loved this gift and couldn't wait to build it. He was able to do this mostly on his own with some guidance. There were several leaning moments as he discovered how this arm worked and after he was finished he has played with it for days and not most interest. I highly recommend.

This was so much fun to sit next to my son, who is 7, and watch him build this arm!

good quality

This was easy to follow step-by-step instructions and it mostly kept my 5 years old's attention to build it. It's pretty cool how it works. But it broke easily not too long after putting it together.

My eight year old enjoyed building this, but the peg that the grabber "hinges" on, constantly pops out. Really frustrating because it could be great fun if they could just have gotten that one piece right.

Leaked water so the arm wouldnt work. It was easy to build, directions were good, but the quality is terrible. Every squeeze of the plunger leaked water so the arm didnt work from the beginning. The adults tried to fix the leaks thinking there was a builder error but the assembly was correct. It just doesnt work.

Good for construction skills, but the arm didn't work. Not enough water pressure.