It's never too early to start.

Research has shown that when it comes to education, it's never too early to start. Brain development is ongoing from birth, and it is important that learning begins long before the traditional age of kindergarten.

http://www.battlecreekenquirer.com/article/20120122/OPINION01/201220305/No-time-cut-back-Funding-early-education-now-will-pay-off-later?odyssey=mod%7Cnewswell%7Ctext%7CFrontpage%7Cs