Tree climbing is an activity for enjoyment. A climber might find a bottle of soap and water for bubble blowing at the top of a climb or maybe even a bell to ring to let everybody know they have arrived. But no one is racing to get there. There are enough races in everyday life. No one should ever be forced to climb if they are afraid.
Some children find their natural ceiling where no further height is desired.
The ceiling is respected by all. Pressure to climb higher from well meaning parents is discouraged.