If you have children try the state parks http://www.dep.state.fl.us/parks/default.htm Each one is different and they are great for families. Entry is per car at approximately $5. Most have a BBQs you can use free of charge (take your own coal). We have always found lots of families having large get togethers and great times.

There is also spook hill which is free and always amusing. Here you can witness your car rolling up the hill http://historiclakewales.com/spookhill/