The "Hello Kitty" 3/4-size sewing machine gets really good reviews and costs about $110. Target carries it, as do other stores. It's a Janome. Here's a link to one at Overstock:
http://www.overstock.com/Crafts-Sewi...0/product.html
There was a 1/2-size "Hello Kitty" which is not as good. I think that one was blue instead of green.
I think the same machine is available in a plain white from Sears under the Janome label (or might be Kenmore-labeled Janome).