This "toy" isn't meant for 7 year olds, the age suggested is 10 and up -- while they are very cool robots (I know several people that own one) it might end up being frustrating at this age.

Also, to address what you said below about a school club, while I wonderful idea, I wouldn't suggest ever bringing this to school - for any reason. If this is what he has his heart set on doing, start with some smaller, less expensive models.