My four year old son had a bath earlier, and as I was helping him into his pyjamas, I noticed something shiny .... in his bellybutton.
I pulled it out, and it was a tiny bolt from a Meccano set.
I said, quite sternly
"Do not put bolts into your belly buttonnnnnnnbwaahhhhhhhhhh ha ha ha ha!!!!!!"
Now he will think putting things into his bellybutton is the funniest thing in the world.
Can he actually damage himself?