Are hue ready for an epic colour challenge? It’s ready, set, stack! Color Stack™ is a head-to-head puzzle race to sort the mixed up coloured rings into stacks of the same colour as quickly as possible before your opponent. One player draws a Challenge Card for both players to complete, showing how the rings should be arranged on the Stack Rack to begin. On the count of 3, both players must race to organise their mixed-up stacks into columns of single colours. 1. Each ring can only be moved one at a time. 2. Rings can only be placed on either an empty pole, or on another ring of the same colour. 3. Each pole on the Stack Rack can only hold a maximum of 10 rings. 4. Players can sort the colours in any order they like on the rack but must start and finish with two empty poles on the rack. Choose from 50 Easy and Hard challenge cards and race your opponent or test yourself against the clock.