Turn this light-up UFO jar into a space terrarium that is out of this world! Everything you need is included. Your complete set includes; ready-to-grow crystals, crystal powder, sparkling space rocks, a squishy UFO, space gems and colorful stickers. Add in the friendly alien, moon rocks, stars and constellations stickers and watch your terrarium Glow-in-the-Dark! Crystal growing is a fun and easy to do science experiment. Just add hot water and watch the crystals grow in as little as 24 hours. Terrarium measures 4 ¾ h x 6 ½ w. Your terrarium light requires the use of 2 AAA batteries (not included).