What 'childish' thing gives you an inordinate amount of pleasure?

[Hellyon]

I've just driven back from a meeting across the New Forest, there is a stretch of clear open road that has a series of serpentine bends in it - I'm always so pleased if the road is empty and I can drive in a straight line through the apex of the bends. Today it totally lifted my mood as I was able to do it there and back!
What things give you a childish sense of acheivement.

[rosandjohn]

watching the needle go up when i fill the petrol tank, i just dont know why spending money on petrol should give me so much pleasure - but it does.