Re: Must have toys for 6-12 months
DD's favs included a set of stacking cups from BabiesRUs. There are 8, they also stack, have holes in the bottom, numbers and can go in the tub. She's 13 mos and STILL loves them. I make a tower and "Jo-zilla" comes knock them down. She also loves a blue vanilla scented ball we got from a catalog WAHM thing... discovery toys maybe? It also squeaks and has nubbies so they can chew on it too. In the warmer outdoor weather you can't beat bubbles too.
Oh and she likes the plastic/soft baby einstein books. She tends to eat the board books!