How to Make an Invisible Dirt Lump

All of our winning wowsers will be receiving their very own invisible, edible dirt lumps. Roll out a piece of clay and press your hand into it. When you take your hand out of the clay, you'll have a preserved handprint for people to find years later. And don't forget to take a photo or a video. Grownups, you can upload pictures and videos to tinkercast.com.