Great little project and the kids love it!
The Cyborg hand was super cool to put together and fun with the hydraulics. We recieved it as a gift for my 4 year old, I had to so the assembly because of his age, but he loves picking up things and pretending he has a robot hand. Also seeing how the mechanics of it works was neat for him. The assembly was easy and clear from the directions and the way it was packed. It looked like a lot at first but it came together within a couple hours. After 6 months I put new water in it and that was just as easy. Would definitely recommend!