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Plant a wild flower meadow and climb trees with his son. At least that would have a lasting effect unlike doing models, which is just a quick fix really

Go to a comedy club.

Though unless it's the Monsters Inc club at Disney, you might want to leave the young boys at home for that one.

OK, have shared the Adler After Dark for adults, for a traveling or 'staycation' family, they also have monthly sleep overs for kids and their parents. It is geared towards for kids between 6 and 10. http://www.adlerplanetarium.org/plan/group/overnights They do have an option for those less adventurous that don't want to sleep overnight in the museum also. Actually I think all of the Major Museums in Chicago have sleep over or at least after hour programs for kids and their parents.