I'm not sure I would describe those as " fun. "
Here are some, I think are mo' funnah'.
Skin the cats on rings or bars.
Ice Cream Makers on rings or bars. I'd start out in a tuck position. Pull into a pullup position, rock back into a tucked front lever. You can also go straight to a candlestick ( inverted ) on the bar. Rock back and forth. Good core conditioning.
Dragon Flag. Lay on the ground and hold onto a base or pillar or something. I have the kids use the base of the beams or parallel bar or pommel horse stands. Get into a candlestick and see how horizontal you can make it.
Support Leg lifts on rings or bars.
Leg lift to candlestick on a bar.
Windshield wipers from a leg lift on bar.
Ab Wheel of Death. Remember those lil unicycle looking hand wheels. I recommend starting from an open hipped on knees position and extending out and then pulling in.
Back bounces on trampoline. To make it harder, try it on a tumble track or a trampoline that isn't springy. Stomach drop to ball/tuck in the air is another good one.
Handstand Leg lifts. Get into a handstand against the wall or free. Lower your toes down to the ground and lift back up to handstand.
Knees to Elbows. Hang from a bar or rings, pull into a tucked front lever postion. Just pull your knees to your elbows or inside.
Last one. Find a set of rings that are just above reaching for. Jump to the rings, and do an immediate skin the cat that mimics a backflip. We have a set of ropes that are close together, so you can use these too.
And if you're really sick, what I was taught being called the " turtle. " Lie on your back in a hollow position. Rock back and forth in a hollow position slightly shifting to one side to go in a half or full circle. Repeat back to your starting position.