Preschool

Help! We are trying to decide what to do with Drew for Preschool next year. Drew will probably be going to summer preschool either in June or July for one month, maybe both. The High school has their "playschool" program in September that Joey attended last year. Drew is excited to go to that too. But...Do we put him in preschool for 2 days a week for the 2009-2010 school year? At first that was the plan, but now with the summer session (that Joey could go to too), Mommy is leaning towards summer and September and skipping 2009-2010 school year. Drew is only 3. He has 3 years until he goes to school since he has a late birthday. Daddy thinks he should go as much as he can. Does it really make that much of a difference if he goes when he is 3,4 and 5 or if he just goes when he is 4 and 5? Or if he goes at all? All opinions welcome!!!