Children are fascinated by the smooth texture, bright colors and odd shapes of these Junior Rainbow Pebbles, packaged in a convenient carry jar. Featuring clear pieces, these stacking pebbles are ideal for use on a light panel or anywhere that enables light to pass through!• Designed for toddlers. Encourage kids aged 18M+ to practice finger dexterity, stacking, counting and sorting. They love the odd-shaped, colorful pebbles!• Take these pebbles with you anywhere. The sorting pebbles are conveniently packaged in a storage jar with lid and carry handle. Perfect for play dates!• Multi-sensory for maximum fun! The smooth texture of these transparent Rainbow Pebbles will delight inquisitive hands and display brightly on a light box.• Introduce toddlers to STEAM concepts! This creative construction set will inspire patterns, light and color exploration and creative designs.This Mini Jar set of clear, plastic Junior Rainbow Pebbles includes 36 pieces in 3 shapes and 6 colors: blue, green, purple, pink, yellow and orange. Activity Guide included. Sizes range from 1.6"L - 2.25"L.