Recess Games (Spell your name WITH STICKS/LEAVES)
This seems like a simple game at first, but you may have to do some running and searching to find all the stuff you need!
Start by picking the name of one of the players. Now, run around your yard or the park picking up sticks/leaves and spell out the name on the ground. You'll probably need to take a few trips around to get enough! Make the name as big as you can if you're up for a challenge!