chorus:
They were only playing leapfrog
They were only playing leapfrog
They were only playing leapfrog
(use last line of each verse)

As on sly snake slid up the slide, the other sly snake slide down...

As one red robin ran up the road, the other read robin ran down...

As one pink porpoise popped up the pole, the other pink porpoise popped down...

As one eager eagle eased in the eaves, the other eager eagle eased out...

As one warm wooly worm wiggled up the wall, the other warm wooly worm wiggled down...

As one blue-black bug bled blue-black blood, the other blue-black bug bled black...

As one fleafly flew up the flue and the other fleafly flew down...
they were only playing fluefly...
When one fleafly flew up the flue and the other fleafly flew down.