click the green flag. Then click the dress-up or play button. Do what i said for you to do
In real life: I made a acorn headband, by hot gluing an acorn with a acorn cup to a plain headband. You can do that too. To play nature sticks in real life: Use a big stick to hit an acorn which will go an amount of distance. if you want 2+ players, then you both do that repeatedly, and see who can get their acorn to a place first.