Bianca Schultz (@book_mommy on Twitter) from The Children's Book Review has two great book giveaways that you can enter.
The first you can enter to win is Groundhog Weather School by Joan Holub. You can enter here for a chance to win.
The second book you can enter to win is one that I'm pretty excited about. Its When You Reach Me by Rebecca Stead. It is a Newbery Award winner, and not only do you win the book, but a book plate signed by the author!
You can enter to win by commenting on each post on The Children's Book Review, and you can get up to two more entries by tweeting about the giveaway and blogging about it.