Plastic cubes link together on all sides of each cube with circle shape cutouts. Easy for little hands to connect and twist apart. Great for counting to 100 by ones and tens, grouping and one-to-one correspondence.100 piece set includes:10 Purple cubes10 Yellow cubes10 Red cubes10 Blue cubes10 Light green cubes10 Dark green cubes10 Orange cubes10 Brown cubes10 Black cubes10 White cubesActivity GuideEach cube measures 3/4".COUNTING TOYS: Teach children to count to 100 by ones and tens while building fine motor and math skills.MATH LINK CUBES: 10 different kid-friendly colors, these cubes are terrific for grouping by color and for exploring patterns.CONNECT ON ALL SIDES: Cubes link together on all sides of each cube with circular cutouts so kids can explore shapes and area.MATH CUBES MANIPULATIVES: Cubes come in 10 kid-friendly, appealing colors: red, orange, yellow, light green, dark green, blue, pink, brown, black, and white.Homeschool supplies for ages 5+