Award Winning 41" SHARK Anti-Gravity Balloons Drift and Hover in Mid-Air with"NO STRINGS ATTACHED"! All Ages! Includes Weights for Easy Height Control. The"HIT of your UNDER THE SEA BIRTHDAY PARTY!" EXCITING NEW "WEIGHTED" ZERO-GRAVITY BALLOONS HOVER IN MID-AIR WITHOUT STRINGS! Toss it up, it floats back down. Throw it down, it floats right back up! "The only toy in the world that you can't put down!" See Videos Below. 1,000 TIMES MORE FUN THAN A BORING OLD STRING BALLOON! You won't believe your eyes! Play games, perform tricks. Guaranteed to Amaze and Entertain the entire family! THE "HIT OF THE PARTY"! THE "PET BALLOON" THAT FOLLOWS YOU, they fly around the house actually seeking out humans. This amusing, but uncanny interactive behavior is based on scientific principals. "THEY SEEM ALMOST ALIVE"! OUR EXCLUSIVE INVISIBLE "NO STRINGS ATTACHED" ZERO-G WEIGHTPAC controls the toys hovering height. You can now "EXPERIENCE THE WEIGHTLESSNESS OF SPACE" in your own home by simply removing weights from the toy to float higher or adding weights to float lower. DURABLE. HELIUM NOT INCLUDED. HELIUM FILL REQUIRED. FLOATS 2 TO 4 WEEKS. REFILLABLE! ONLY AVAILABLE HERE. Other balloons sold on Amazon may LOOK LIKE OURS, but they DON'T INCLUDE WEIGHTS OR HOVER IN MID-AIR! See Videos Below.