Preschool is a term for early childhood education. It is education for very young children between the ages of three and six, before the start of compulsory education at elementary school/primary school. There are theories of child development which influence preschool activities, with the ideas of Jean Piaget that categorise this age group as a “preoperational” stage of development being the most influential.
Early childhood education usually encourages children to learn by playing. But basic topics like counting or the alphabet may start to be taught.