The range is not a rule, and children arrive at both ends at different times. But the two edges fail for different reasons, and knowing which edge you are on tells you what to do instead.
Under about five
The problem is the gap. A sticker now for a prize on Saturday asks a very young child to hold a connection across days, and mostly the sticker becomes the whole reward — which is fine, and is why sticker books work at that age without any points system attached. Adding a total, a target and a prize adds machinery that is doing nothing.
What works instead is immediate and physical: the sticker itself, the tick, the thing you both look at together right then. No accumulation, no goal.
Twelve and up
The problem is not comprehension, it is dignity. Around this age a chart on the wall starts to read as something being administered to you, and the child is not wrong. Anything that looks like it is for younger children is going to be refused whether or not it would have worked.
What works instead is an arrangement they had a say in: what counts, what it is worth, what it is for, negotiated rather than announced. The mechanism can be identical. The framing decides whether it survives.
Between the two
| Age | What is doing the work | Easy mistake |
|---|---|---|
| 5 to 7 | Being noticed, and the total going up in front of them | Prizes too far away to picture |
| 8 to 10 | Choosing the prize, and seeing progress toward it | Too many things on the list |
| 11 to 12 | Having a say in what counts and what it is worth | Anything that looks like it was designed for a six-year-old |
Climb Rewards is built for five to twelve for exactly these reasons, and an age outside that is clamped rather than quietly accepted.