I dont really set an amount of time as far as how much they can watch. When my first child was born, I had on sesame street and dora EVERY day. She is now five, and knows quite a bit of basic spanish, knew her alphabet and could recognize letters at 18 months, and is one of the smartest in her class. I dont think tv is harmful, as long as its the right kind of shows. Also, it doesnt hurt to have the tv going on in the background while your children play. My 13 month old absolutley LOVES Curious George. At 11 months he was able to say 'Joge' (for George), and could recognize curious george when we were at the store. He still watches the show daily.
I would also recommend reading to your preschooler too. And just spending quality time with him/her. As the saying goes 'don't let tv be your babysitter'. But its not gonna hurt them to watch a couple shows. :)
at 10:08 AM on Feb. 6, 2009