5 yrs. & up. Find the hidden math bounty in ten-frames! Playful theme supports hands-on reinforcement of base-ten number concepts and early addition and subtraction. Great for helping young students to relate to the number 10, building a strong foundation for mathematics. Includes divided Treasure Chest, 4 Ten-Frame Trays, 40 Silver Coins, 40 Gold Coins and Activity Guide. Chest measures 9" L x 5" W x 5" H .