some ideas straight from my 4 1/2 & 6 1/2 year old little girls: (aside from barbie barbie barbies)
toy trains -- constantly building different patterns
their kitchen/pretend food
(keeps them busy for hours!)
plastic baseball set
costumes (love that)
legos
their art center-easel (they play school -- need alphabet magnets, paper & lots of chalk and crayons too -- blunt scissors -- builds their little hand muscles for better writing!)
Trouble/Sorry games - Princess Monoply
Little Foot (the dinosaur movies)--oh, and the Leap Frog Learning Movie series -- sounds, letters & reading & math
(of course, the Princess (Disney) stories vol. 1, 2 & 3 (they all do teach something positive ideas)
scooters
bikes
sidewalk chalk
oh, and they said "cards"
(we play go fish & rummy)
books & blocks (big blocks, little blocks all kinds of blocks......#1 recommended gift for intelligent/smart little kids:)