Pikku Tuhattaituri is a child’s workbook for preschool mathematics. Diverse tasks inspire the child to study mathematics. Through various tasks, the child learns to categorize, serialize and compare, among other things. The book includes the Tuhattaituri envelope, which contains logical pieces, number cards, scatter buttons, and tangram pieces. The pages of the book introduce Kasse the Magpie and Kurre the Squirrel, who continue their adventures in the mathematics of primary education.