This glow in the dark slime is composed of a glowing material that activates once exposed to daylight. Comes in assorted colors only (may vary, single colors not available). Imprint your company name and logo on the lid to promote birthday parties, craft stores, day cares and more! Recommended ages 3+. Due to the different densities composed in the glow slime, it may separate over time (knead the slime before using).