A collection of 16 illustrated plastic durable worksheets, distributed into 4 series of 4 worksheets. The children find them very attractive and they serve to support various handling activities, allowing the acquisition of the first notions of mathematical logic. They are particularly aimed at children aged 5 to 7 years old and they promote the use of “rulers" of the classroom in various fields: correspondence, plane fractioning, quantity approximation, size and measurement. By means of these activities the main mathematical areas are looked at.