A swarm of butterflies circles as if looking for something. When your shadow enters nothing appears to happen at first; eventually, if you remain very still, you gain their trust and they begin to land on your hand or shoulder to rest. If you make a sudden movement they will scatter as even the slightest twitch sends them into a panic.
Sand
A stream of liquid sand flows from above and reacts with your shadow as if it were solid. Like making shadow puppets, you can easily construct concave structures with your hands to catch the sand and then you can pour it from hand to hand or maybe into your friend's mouth. Play with it long enough and you might discover some of its many secrets.
Fire
The screen is blank white until you move in front of it, when trails of swirling flame then follow you. The effect is both gentle and violent. Mostly soothing, a little scary.
Molecular Bubbles
An impossible fluid reacts to your shadow forming long polymer chains and loops. Although exotic, the action of the bubbles is surprisingly intuitive. Connect the chains to the color generators and brilliant colors emerge from diffusion.
Fish Swarm
A swarm of creatures scoots about, schooling like fish. As your shadow enters, the creatures rush towards you and hide inside your shadow. You move and reveal them behind you, crowded together and squirming like insects. If you pay attention, you may discover that, whether you like it or not, you are an integral part of their ecosystem.
Reflecting Pool
In an alcove, water flows into a pool surrounded by plants. The water trickles down the wall and ripples in the pool. You reach to touch the water, and it flows around your shadow. Many people are surprised when they touch the water and discover that is is dry.
Marble Marshal
Can you marshal the group of red and blue marbles into two distinct groups? It's harder than it looks because the marbles tend to stick together. You'll probably have to use your whole body and have some help. Before long it might seem like you are playing a game of twister.