With "C-Coin" by Zhao Xinyi, you can place the coin in their hand and let them close their fingers around it. When they open their hand again, the coin is a different color. They can then check the coin.
Add in some additional ungimmicked coins and you unlock a whole new world of coin magic effects (exchange, prediction, which hand, etc.).
"C-Coin" is a versatile gimmick that you'll love using. It resets immediately, so you're always ready to go.
Comes with: