When I was 5 or so, I was convinced that if I dropped a bowl of hot water into a bucket of cold water, I'd get big explosion. That experiment yielding lukewarm water ended my mad scientist career.

When I was 24 and a PhD student, I wondered one day if I can eat condensed milk hanging head down.

Never let your age stop your curiosity.

But also learn from other's mistakes (and don't try to eat condensed milk when hanging head down)