Taking my prompt today from a German expression. Now I've worked on prompts like this before and it hasn't been very productive but I keep trying...
Here's the first part of a draft poem:
They told me
German idiom: Di Katze im Sack kaufen
English equivalent: buying a pig in a poke
When you get older you can ride a bike.
As time goes by things will get better.
If you wait for your birthday you can have it
or save your pennies if you want that doll.
Wearing sensible shoes means you won't fall over
the ones beneath you who aren't worth it anyway
and people who get caught by the police
end up in prison. You should never sleep...