Assemble your multi-color LED base. Then make a small electrical circuit and connect your LEDs, all the while learning about anodes and cathodes of LEDs. Then, grow one sparkling “citrine” crystal cluster on your multi-color LED base. Watch the magic crystal glow at night! Growing SPACE AGE CRYSTALS is not long or complicated. Just dissolve the pre-mixed crystal powder in warm water, within hours sparkling crystals will start to grow right before your eyes! A fascinating experience for children and adults.