How old? 1-3 years old is too small. Reccommend start sending to playschool/preschool starting 4 years old.

I send my daughter at 4 years old to a playschool.

Develop their fine motor skills. Starting 5-6 years old only sent to really learning preschool.

I noticed she picked up reading, writing and simple math fairly quickly at 5th years old.

She Turn out just fine.