The little ones were playing with some small dolls. The dolls were taking an imaginary walk in a forest. As part of the story Wee Tiny said "then they met a big scary frog!"
And Wee Small shouted "No! Then they met Yellow Mellow P!"
At that point the little ones screamed.
I suppose I would too if I was in the forest and met the letters "L,M,N,O,P."