Look for bright flashes of colors of the thing you are looking for.
What Are Some Good Scavenger Hunt Birthday Party Questions Or Clues?
It depends on where the birthday party is happening. You can hide clues around the house or have the hunt in a local park. You can hide objects or have them look for things already there. Or you can hide colored squares of paper with point values on them and they need to find those. Www.scavenger-hunt-guru.com has some interesting hunts and ideas that might work well for the birthday party too. Good luck!