text: Works fine as a pacifier but ours don't glow all night long. The only way I see it glowing like it is in the photo is if you put it near a black light for a few hours or leave it out on a sunny day. Otherwise it is very faint. We got this more for the glowing aspect but I got rid of my black lights in the 90's. Also the sun doesn't shine on our house because of the swarm of giant eagles flying around looking for Gandalf.