Itucci, I have a 2.5 year old and can fit a kelly long wallet, hairbrush, cosmetic case, keys, cell, blackberry, palm pilot, DS sippy cup, mini box with two crayons and small notepad, 1 hot wheels car, 1 thomas the train character, small baby wipes box and 2 diapers...all very easily. The outside pocket has my secret weapon...dum dum lollipops. These are a LAST RESORT!!!
Keep in mind, the cosmetic case and hairbrush are minis...of everything. Wish I could actually give up my palm pilot...just too hard to do that when I change cell phones every 2 years and blackberry is work related.
Great bag...perfect for a mommy!!