I bet I can take a coin from under the ‘drawer’ of a matchbox without touching it.
I bet I can make your phone unreachable without touching it or turning it off.
I bet you cannot keep a disc made of cork in the centre of a glass of water.
I bet I can balance a plastic card on the rim of a glass full of water, and I can even place some coins on the overhanging part of the card without the card tipping over.
I bet I can tilt the balance of the seesaw without touching the glasses or the seesaw itself, or without changing the amount of water in the glasses.