Reckon you've got more will-power than a 4 year old?
Could you resist eating one of your favourite chocs for 20 minutes? How about if we promised to give you double if you could hold out?
This type of test is perfect for testing your grit. That's your ability to sacrifice what's in front of you for something more significant, but not immediate.
If you can hold out and wait for the things that you really want, you are more likely to be successful and happy in the long run.