Spoon Bells

Any time you hear a sound, it is because something is vibrating. Place your fingers against your throat and hum. You will feel your throat vibrate. We usually hear sounds from vibrations that travel through the air, but solids can be much better at carrying vibrations.

Stroop Effect

The following test is a way to evaluate your executive functioning. What is the world is that? Well, it means how good you are at telling your brain what to do, even if it wants to do something else.