Fantasia would be the best miniature golf course for you. It's walking distance from the Beach Club. To get there, go out the entrance at the lkae and make a right. Walk by the Yacht Club, voer the bridge at the Dolphin and then make a right after that to go past the Swan on your left. Go by the Swan quiet pool to your left and when you get to the beach area, the walkway will turn to the left. Turn with it. Fantasia will be straight ahead and across the street.
There are two courses. The Fairways course is like a real golf course and you'll pass that on your walk after you cross the street. That will give you an idea of what the course is like. The Gardens course is more like a tradtional miniature golf course with danicing hippos, etc.
The Gardens course is slightly challenging for adults and challenings for the kids. The Fairways course is VEY challenging for adults and kids will have a tough time. The Gardens course takes about an hour to an hour and a half to play. For the Fairways course, plan at least two hours.