How to test if a child is interested in programming?

Assuming a child (10) has no knowledge of programming, is there any fun way of giving him a go at it and seeing if he wants to go on? I myself started with programmable calculator and continued onto zx spectrum. I had different motivation of doing so - no internet, just pure fun of messing with what you have. Nowadays computer is not something you need to make do things, it just does them all.