Here is our fairy in a jar craft. It doesn't look quite like the ones on pinterest but our babies had never seen that one so they were pretty mesmerized. Although, my 3 year old kept wanting to open it up to let the "fairies" out.
I couldn't really find an original source but here is what we did. We took caning jars and put a little glitter in the bottom and cut open about 3 glow sticks then closed the jar and shook them up. We had a little trouble cutting into the glow sticks until we realized you have to "break" the little capsules inside that make it start to glow.
I really apologize for this picture. I have done everything I know how but it always uploads sideways. As you can see the yellow is glowing the best. Also, the glitter is literally sticking to the sides of the jar and glowing. We liked it but not at all the way pins were showing it.