Get 12 sheets of paper and write 'red' on 3, 'yellow' on 3, 'blue' on 3 and 'green' on 3. Mix them all up, and lay them on the ground.
Choose one person to pretend to be Ben. They then stand with their back to the climbing wall, calling out a colour, one at a time.
With every call out, each player must place a hand or foot on the chosen colour.
Keep it in place as Ben calls out the next colour. Stretch or bend to reach the next colour.
Keep going until someone falls, then swap so they become Ben.
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