As we learn to distinguish the real “why“s from the “just-keep-talking-to-me-why“s, David and I are stretched to explain many of the things around us that we take for granted.

Here’s an easy experiment that shows the relativity of warmth and coolness according to our body temperature.

Aisha, 3yo, January 2009
David used this simple experiment to teach Aisha why she should NOT keep the fan on high all night. (She may be cold even though she doesn't feel cold.)

Get three large bowls. Fill one with room temperature water. Fill one with ice-cold water (we stacked ours with ice cubes). Fill the third bowl with hot water, as hot as you can handle.

Place one hand each in the hot water and cold water bowl. Leave for a couple of minutes.

Then remove your hands and place them both in the room-temperature water. Your hands will feel the temperature of the water differently. The cold hand will feel warm, and the hot hand will feel cold. It’s a bit eerie.

Good fun.