If you've got kids you know that sometimes the dark can get quite scary for them. To help ease them to sleep at night, make sure they have a night light. This is a neat way to make your own glow in the dark night light in whatever color they prefer! All you need is water, a jar and glow sticks.
Warning: Glow sticks are dangerous and poisonous so do not let your children play with them on their own or during the process of making these.
Here's another easy way to create a glowing jars but a more adult version:
The picture above uses highlighter liquid and fake plants/animals. Let the highlighter and water sit overnight and then take out the highlighter insides out of the water which leaves you with glowing liquid.