I was there about 5 or so years ago with a GF and her 5 year old son. There were lots of exhibits for the kids to do hands-on activities and we had a great time. For free, you can't go wrong.
Are we talking about the Orlando Science Center? Is good! I have been there some time ago. However some exibits are kind of old, some are been renovated, but if you have never been there, is a good place to see. The tickets for Adults are $14.95 and kids 2 to 11 at $9.95 each.