Made of durable plastic. Teaches early number skills. Provides encouraging visual clues. Edged top crust to hold pieces in place. Reinforces fine motor skills. Recommended for ages 3 years and up. About Learning ResourcesA leading manufacturer of innovative, hands-on educational materials and learning toys, Learning Resources has been teaching children through play in the classroom and the home for over 25 years. They are a trusted source for educators and parents who want quality, and award-winning educational products. Their diverse product line of over 1300 products serves children and their families, kindergarten, primary, and middle school markets focused on the areas of mathematics, science, early childhood, reading, Spanish language learning, and teacher resources. Since their founding in 1984, Learning Resources continues to be guided by its mission to develop quality educational products that make learning exciting for children of all ages and abilities. They strive to create hands-on products that build a concrete foundation of skills through exploration, imagination, and fun.