Mideer Fluorescent Wall Stickers Kids Glow in Dark Water Proof Reusable Room Decoration. Happy learning in Play, cultivating aesthetic appreciation in learning, and deepening the cognition of life in beautiful things. The sticker has the function of absorbing light, which can be kept for 2-5 minutes when the light is sufficient. Good waterproof effect. Noctilucent paste does not affect the use of luminous paste after being completely immersed in the water. Perfect for any kid who doesn’t like the dark of is a space/Ocean fanatic great inexpensive gift idea. A little reminder: You must turn on the light at night to absorb the light.