US Toys & Games First Sum Puzzle Plus & Minus brings joyful learning to kids aged 3+. Making math exciting, it turns addition and subtraction into a playful adventure. With 24 self-correcting puzzle cards, it boosts intelligence through stimulating challenges. As children match cards, they build critical thinking, problem-solving, and numerical skills, all while having fun. Crafted with safety in mind, these durable cards invite parent-child bonding, fostering a strong foundation for academic success.