S.R.
My kids both went to Great Adventures for 2 years through Plainfield Park District. I think it was great! You can go on the website or look at brochure for the park district for pricing - I thought it was reasonable. They offer MWF or T/TH (1/2 day=2.5 hours) morning or afternoon programs for 4 year olds. You can also call Leslie Anderson (Director) at ###-###-#### for more info. HTH
S.