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infant
an infant is a newborn baby that is to little to take care of itself. -
toddler
They call children from 12-24 months toddlers because they are just learning how to walk and when they do walk they toddle a lot.Toddlers are more coordinated and physically, emotionally, and socially skilled than infants. -
preschoolers
the reason they call them preschoolers when they are 3-4 years old is because they are just starting school. so now they're learning all kinds of skills such as people skills and sharing.
