See who can keep their balloon off the ground the longest. For example, balloon match-up, counting, etc. You can also make a balloon lotto game. Or memory game. And, as you know, when balloons deflate, they fly around the room.
Kids love to make and play with balloons paddles.
First, they can decorate a paper plate with markers, crayons, whatever. Next, attach a paint stir stick to the back, taping or stapling, with another plate on the back.