One of our favorite ways to make bath time more fun is to throw some glow sticks in the water. If you’ve never done this before, you should try it, the glow sticks make the whole bath water glow.
Of course, as with everything, there is an explanation behind why this works the way it does…
First you’ll need a little scientist who needs a bath.
Then you’ll want to pick up some of these fancy glow sticks. Dollar Tree sells them for $1 per pack, Walmart sells them for 98c per pack. Or, if you find you do a lot of glow stick activities, you can do what I usually do and buy them in bulk online at $9 for 100.
Crack the glow sticks to activate them, then toss them in the water and turn out the lights.
Observe the way the light changes when you move the glow stick in and out of the water. The way the light changes when it passes through water is called refraction.
A more concrete example of refraction can be observed anytime you put a straw into a glass of water. Note the way the straw seems to be bent or broken at the place where it enters the water.
For more hands-on science experiments, be sure to check out our Pinterest board:
Follow Science Experiments for Kids on Pinterest.
Link up your science posts below!