Most preschools consider an appropriate age to start preschool to be around three to four years old, but this isnt a magic number for every child. Its important to consider your childs unique readiness signs when making the decision. Every child develops at their own pace, and some three-year-olds may be ready for preschool while others may need more time to gain skills to do well in the classroom. Some preschool programs are designed for children between the ages of two and five years old. Preschool readiness depends on a lot more than age, and factors such as separation anxiety, social development, potty training, physical development, nap necessity, persistence, curiosity and imagination, and communication skills should be considered. If your child isnt ready for preschool, theres no harm in waiting until theyre older to enroll them in preschool. Preschool programs usually accept children up to four years old. Its best to start looking for preschool options when your child is around one year old or even sooner, as preschools tend to fill up quickly.