Sport stacking is an amazing sport of fitness, agility, concentration, and quickness. The Speed Stacks StackPack from Speed Stacks includes everything kids need to start fast stacking! Each set includes 12 official Speed Stacks cups that are available in four colors: Red, blue, green, and black; the STACKit precision timer, which doubles as a protective carrier for your cups; and the StackMat stacking surface for optimum performance. The set also includes a STACKFAST training DVD and printed instructions for beginners!