My 7 year old received this as a Christmas gift, and it has been his favorite toy. The whole family gets involved with the magic experiments. The wand is difficult to make, but not impossible. The little black stoppers for the tube are ridiculously tight, and require an adult with upper body strength and/or patience, but it's worth it when blue slime doesn't leak out and spill on your carpet. Once it's done, you don't have to take them off again unless you want to, so it's one annoyance with a good result.
Once the wand is made, the little wizard can perform the other experiments that are incredibly cool to the 7-12 year old set, particularly the magic smoking fingers trick.