But there's also a big difference between 18 months and 4 years. There are definitely preschools in Silicon Valley where the kids are reading chapter books by

But there's also a big difference between 18 months and 4 years. There are definitely preschools in Silicon Valley where the kids are reading chapter books by 4. We chose not to send our kids to one (we don't want them to miss out on play and socialization for academics), but we have a few friends that have sent their kids there.