These 6 Water Blocks come in 2 shapes. Children can put the blocks together to learn about new colors. Littles ones will learn about color theory as you place blocks on top of on another to see what new color they can create Lay flat or stack on their sides to see how the liquids goes from covering the whole window to only a portion Sustainably made in Thailand using chemical-free rubberwood, formaldehyde-free glue, organic pigments and water-based dyes. Suitable for 3Y+