Enjoy Family Time: With ECHOCUBE glow in the dark stars, children fully use their imagination to create various patterns and letters. Parents and children put up a constellation map on the wall together, which teaches child to know the constellations. At the same time, parents and child will enjoy a happy family time. Create a Wonderful Starry Sky: You can create a wonderful starry sky with ECHOCUBE different sizes glowing star stickers. These stars twinkle in the dark, turning your bedroom into a breathtaking galaxy. Your child will no longer be afraid of the darkness and have a nice dream. Long Lasting Glowing: Expose wall stickers to bright light for at least 15 minutes, then turn off the lights, you will enjoy your night view. Luminous adhesive stickers will glow in the dark for 4 to 6 hours. The brighter the light they absorb, the better the effect appears in the dark. 100% Safety Material: ECHOCUBE dark stickers are made of PVC, which is waterproof and non-toxic material, safe for kids. You can peel them easily and stick on a dry and flat surface firmly, and they will not fall off until you remove them. 521 star stickers: ECHOCUBE glow in the dark stickers set includes 521 luminous stars in 4 sizes: 32 stars (25mm), 102 stars (15mm), 144 stars (10mm), 243 stars (5mm). Abundant stars are shining on the wall to accompany your child at night. When seeing the starry sky within reach, your child will feel in a dreamlike world.