Entertain the kids with science: Make your own thermometer

Posted at 8:43 AM, Mar 24, 2020
and last updated 2020-03-24 09:43:55-04

If you're looking for fun experiments to do with your kids while all of you are at home we've got you covered.

Today, Daniel Phillips explains how to make a thermometer out of items that you may have lying around at home.


Clear, narrow-neck plastic bottle
Food coloring
Clear plastic drinking straw
Playdoh or Clay
Index Card


Fill the bottle with water about 80%; don't fill completely

Place the clear drinking straw so it goes 1/2 to 3/4 of the way down the bottle.

Use the playdoh/clay to seal the top of the bottle and hold the straw in place.

As the temperatures go up you will see the food coloring rise toward the index card.

You can use an actual thermometer to make sure your measurements are correct.

As the temperature rises, the liquid will move up the straw and vice versa.