Spin Master's Otrio reinvents tic-tac-toe with surprising tactical depth—ideal for sharp minds aged 8 and up. The goal: line up three rings of your color in ascending size, either in a row, diagonally, or nested on the board. Simple to explain, yet formidably strategic to master. Up to 4 players can compete in under 10 minutes, making it a reliable choice for family game nights or quick matches between activities. Playable solo for practice or in multiplayer mode to spice up gatherings, Otrio is suited for both children and adults up to 99 years old. CE certified, no batteries required.