Speed Stacks Sport Stacking Set The Leader in Sport Stacking The only cups endorsed by the World Sport Stacking Association (WSSA) for competition 12 Neon Green Speed Stacks Cups Winner of a 2018 Family Choice Award! The "Family Choice Awards" recognize the best in children's and parenting products. Now in its 21st year, the "Family Choice Award is one of the most coveted, family friendly consumer award programs in the nation. Sport Stacking is one of the fastest growing new sports in the world Stackers up stack and down stack 12 specially designed (Speed Stacks) cups in specific patterns using the patented StackMat to measure and record their best times