Goal and options: stick
output answer: can help start a fire

Goal and options: How to keep sand in sandbox cool during the summer.
output answer: Place a blue plastic tarp over sandbox when not in use.

Goal and options: open a bottle of soda without it exploding
output answer:
To make sure your soda bottle doesn't explode when you open it, just slowly, slowly, so, so slowly open the cap. Turn it a little crack and you'll hear the hiss of gas escaping and you might even notice bubbles roiling below the surface. However, if you've opened it juuuuust enough no liquid will be able to escape