I think they should try the skydive at naperville, florida.
or try south beach, miami. Ofcourse Orlando has epcot, tampa has busch gardens, universal studio, kennedy space center.
WA is quite mountainous and beautiful, pullman's 8 mile plouse is great, you can even get some fresh groceries at wincofoods in Moscow, ID.
Teenesseee's three cultures are also great.
The god damn grand canyon is a must see.