Teachables Interlocking Base Ten Set - Plastic Manipulatives, Set of 121This set of 121 interlocking base ten pieces includes 100 blue units, 10 red longs, 5 yellow flats (without print), 5 yellow flats (with 1 100 printed), and 1 green cube. The pieces interlock, making it easier to stack the blocks securely and preventing them from sliding or falling off during use. Ideal for teaching place value, this set is designed to visually demonstrate how multi digit numbers are constructed, helping students develop a strong