Kriston - you are so right! DS would be wiped out w/ school and come home cranky. Over the summer, he was given the opportunity to take two MadScience camps back to back due to low enrollment in the aeronautics course. they gave a huge discount and said that if it proved too much for DS (then aged 6), we could drop one of the classes for a full refund. He was there from 9-4am, and had lunch w/ the instructors and the few kids who stayed all day. Well, the kid came home soooooo energized!!!! He was happy and talkative. Nothing like how he returns home from school.