Inspire construction and creativity with this early learning activity set. Encourage visual perception, sorting, counting, sequencing, stacking for preschool and kindergarten students! This educational toy includes 36 plastic pebbles in 6 sizes and colors (red, orange, yellow, green, blue and gray), 25 double-sided activity cards and 1 Messy Tray. Perfect for sensory bins and at-home learning, the wonderful tactile experience of the smooth, rubbery pebbles in six different colors will delight the senses. This kindergarten math kit also teaches early counting, addition and subtraction. As children create with the pebbles, they will sort, sequence and improve language skills. Size of pebbles: 1"L x 0.75"W x 0.25"H - 3.25"L x 2"W x 0.5"H. | For ages 3+.