Delicate to assemble, but the pay off is worth it.
I purchased this robotic arm for a robotics class that I facilitate. The youth were not sure what to make of it, but once we started assembling it, it was a bit of a challenge because of the balsa wood parts...but after dinging one of the pieces early...(which we were able to repair) we were able to complete the kit, and it functions wonderfully and gives a good entry point to learning kinematics. Highly recommend starting with a kit like this before going into the fully blown robotic arms.