One legged uphill race for clipless riders – no swapping leg though!
Space invaders – mark off the play area with stones/sticks/rucksacks, objective is to get in each other’s way and force them to dab but not crash. Each dab is a “life”, can have any number of lives. All about slow speed control/track standing.
Find a long stick and play bike limbo. Lower the stick with each round. Make a silly paper crown for the limbo king/queen and tape to their helmet for the rest of the ride.