It is probably the simplest one of these that we've done. You just make a sentence using some kind of animal name and some other word that rhymes with it. An even easier way to explain would be to give some examples.
"There are APES in the DRAPES!"
The frog lived in the peat bog.
...and so on. Mine are pretty tame, although it gives me a giggle to imagine someone's fine velvet curtains infested with primates. Let's see what else we can come up with!