text: To balance cards on top of your head, the cards must be above your head and physically connected to your head in some way, held up only by gravity. The cards don’t have to be touching your head, so they can be balanced on top of a hat, for example, but you can’t put something on top of them or use adhesives to keep them in place. A good test to see if you’re balancing them properly is that the cards should be able to fall off if you tilt your head until it is horizontal.