A science question...please help me.?

Question

i need a substance that shows up really good on grass and concrete but as soon as you want it gone all you have to do is spray a hose and it will go away. i need it for like when you wrap people and you want to write on stuff. please help me. i need it by tomorrow.

Answer 1

Silly string works great. Easy to spray, stands out, and wipes off easily. Its cheap too. Go to your local party store and they should have something.

Answer 2

shaving cream... silly string? lol