The Uzzle Stack RoyaleNumber of Players: 1 4 FAST PACED AND ACTION PACKED: Players race to build the structure on the card by using their set of 8 colored blocks to match the colors and arrangement of the structure. Sharp eyes, fast hands, and quick minds prevail in this fun filled structure building frenzy! SUPER FUN AND EASY TO LEARN: Uzzle games are loved by over 100,000 families in the USA. Stack Royale can be learned in 10 minutes and played for a lifetime. BOOSTS