In reply to Qwerty2019:
Our 3 year old loves his magnet monkey. Indeed a great motivator for the kid to rescue and with magnets you can ’fasten’ it to smaller holds (on the bolt).
One game I played with the kids when I was still coaching was a mod of the ducktape game mentioned by Jimbo. We used Post-it stickers and had letters on them. The Teams would try to climb the route in question and when one tops out, the team writes the letter down. The letters will tell them where the reward/treasure is.
we also did the laserpointer game where the kid points the holds to the climber. But this only works with a bit older ones (say 12 and up). I also required, that If the climber can’t do the move, then the pointer will need to do it (so no absurd dynos etc).
but Yeah, these were all done on a boulder wall