The fun center has a pretty decent arcade (tho the prizes aren't really anything exciting). But we do love just playing the games and hanging out there. The mini-golf course is hands down our favorite and we play there every time we visit Deep Creek.
For smaller children and children at heart, there is a large Carousel out back. In addition to the Carousel there is also a climbing wall and a go-kart track.
After all the fun you have - they have ice cream and some simple menu dinner items in the snack shop.
Beware tho - there is no changing table in the bathroom!