Etoys.com has a vast array of toys and games for children of all ages. They have sales of up to 80% off on various different categories. In addition to toys and games they offer musical instruments, learning activities, and sporting goods.
KimmyShop often has a free shipping coupon as well as a coupon code worth 10% off. KimmyShop is organized by character so you can easily find the type of product you are looking for. There are books, puzzles, lunchboxes, DVD's as well as toys and stuffed animals.
The Disney Store has - you guessed it - everything Disney imagineable, toys, games, figurines, clothes, and home furnishings all organized by your favorite character. Look out for good clearance sales as well as sales around the holidays. Free shipping coupons are also sometimes available.
Ward's Natural Science carries science experiments, models, as well as supplies for exploring the natural world such as telescopes, microscopes and guidebooks.