Very challenging model. This is very well engineered but the instructions are a bit lacking in clarity. But if you read through them a couple of times before starting, it will help. The instructions have the claws assembled on top of the head of the scorpion. It is a very easy step to mount them under the head as my picture shows. I think this would be a bit challenging for younger people. It's also a bit challenging for people with larger hands. All in all, I found this scorpion to be a fun project that was challenging enough to be fun but not so challenging as to be frustrating.
Awesome kit! Challenging and fun!
It was a real challenge but the final Scorpion looks great. It looks like it could zap you right now!