Constructive Playthings Flexi Hexis are a great hands-on manipulative to help children with counting, sorting, patterning, sequencing and color recognition. Little learners will also build fine motor skills and improve hand-eye coordination while hooking the hexagons together. The Flexi Hexis can also be used to teach early math concepts of addition and subtraction. They are composed of a flexible plastic material that is pliable and easy for small hands to manipulate. The flexible plastic pieces hook together on the backside allowing for a different type of fine motor skill. They come in 4 bright primary colors of red, yellow, green and blue. The Flexi Hexis are a great item to keep children engaged in learning while being entertained and having fun. The Flexi Hexis come in a set of 160 pieces and are an ideal addition to the classroom, preschools, and the home environment. The durable plastic can be cleaned with a mild soap and water mixture with a soft, damp cloth. Constructive Playthings Flexi Hexis are recommended for children ages 3 yrs. .