K.B.
I lived in Colorado Springs for 6 years. If you like snow 3/4 of the year, Colorado is the place to be...You do have to worry about snow until at least May, and at times, even in June. (Flurries on my Wedding Day--May 24th) I would never move back...too much snow...
Colorado Springs is beautiful in the warm months...even has won National awards! Very kid friendly, and about an hour from Denver (the only real aquarium you will find)...Mountains are close and Monument is even closer...Kid friendly, and close to mountains, horse back riding, hiking and the works....
Unless you live in Denver, most towns in that surrounding area has everything you are looking for.....