You are sure to have a glowing Mother's Day after giving your mana this Crystal Cube Firejewel Necklace. ThinkGeek has it for $29.99, and this cube comes in white, pink, or blue... it's your choice.  How does it work? Here ya go:  It's a solitaire necklace with a single AB-coated* 10 mm Swarovski crystal as its focal point. Inside that crystal is a tiny LED. The 17" neckwire which creates that hip, floating "illusion" look is also functional. It carries the current from the clasp, inside which is housed three easy-to-replace, LR41/AG3 batteries. When you close the clasp, it creates a circuit and voila. To cut off the current, just disconnect or reverse the clasp.