1. A circus tent to go with the merry-go-round. Could have lion and lion tamer, elephant, sealion with musical horns act, tight rope act, trapese act, man cannon, tiger act where they jump through hoops, some clowns like in the minifig series 1 and 5 and ofcourse the ring master with a few audiences.
2. A lego city park could be on 4 green 32x32 baseplates (big park), walled park with plenty of trees & plants, some benches a few bins, lights, pond with ducks, a dog walker, people having a picnic, skateboarder and/or cyclist, a police officer, people with a football or frisbee, maybe a fountain or statue in the middle.
3. Campsite, could be on a 32x32 baseplate with river running through. 4x4 plus minifig with backpack and fishing rod, tent & campfire, a few logs, a spit with fish and a brown bear, just like the polar bear but brown and some trees.