Target has a daily deal on select backpacks today. You can get most of them for $20.00 + FREE shipping (regularly $29.99).
They have quite a few varieties to choose from, my favorite being the one pictured above.
You can also get this J World Kiddy Backpack with Tote for $25.00 + FREE shipping (regularly $33.99).
And if you use your Target REDcard you’ll save an extra 5% off your purchase.