a rhyme

Today in the car Hans came up with his first little rhyme!
We were singing songs about everything we passed (Hans would say, "Sing a car song," and I'd make something up; he'd say, "sing a bike song," and, wishing I knew a bike song, I'd sing a bike song; he'd say "sing a tree song," and so on). Then suddenly he began his own little ditty!

It went something like this:

the little piggy, the little piggy
went up in a tree.
the piggy talked
"Oh, this tree is for me!"