Go ahead and plan a visit to Orlando Science Center if you’re in the area. It gets a “good” rating for the value of around $15 ticket for 4 floors of fun. Having been here years ago, I noticed some of the exhibits were now well worn in by lots of little hands-on friends, but still in working order. The teenagers loved the “hurricane booth” and liked the Cinedome experience which was included in the cost of entrance, but other than that it was a trip mostly geared for preschool and elementary ages.
If you’re short on time, take the preschoolers to the Nature Works exhibit and Kidstown area first. Older kids can go straight to areas that interest them most.
The touring exhibits are often their best draw. I still remember the touring BodyWorks exhibit from years ago and a Star Wars exhibit is coming soon. Not a great trip for all ages, but hey, any day we get to spent together is a day well spent.