On the suggested lines you could do the first aiders carol,
On the first day of camping a leader sent to me a small boy with a grazed knee.
On the second day of camping a leader sent to me 2 sore stomachs and a small boy with a grazed knee
Continuing with 3 broken arms, 4 sprained ankles, 5 bleeding noses etc.
Get the kboys to invent the rest with suitably bandaged cubs coming on stage