ONO 99™ is a fast-paced yet easy-to-learn card game that involves basic mathematical addition and subtraction skills. Each player places a card on the discard pile and calls out the total. The objective is to keep the total under 99. Watch out for the ONO 99™ card. If a player is dealt or draws an ONO 99™ card, they must keep it and may not play it. There are also special cards like reverse, draw 2, and a minus 10 card. The last player left wins! It makes a great game for teaching children basic math skills!