Sew a medium sized diaper bag with plenty of pockets for staying organized! Check out the full tutorial from Blue Susan Makes.
Diaper Bag Patterns - Over 100 Free Diaper Bag Patterns to Sew
DIY Diaper Bag This looks like it would make a good swim bag as well.
DIY Diaper Bag Tutorial Sew a medium sized diaper bag with plenty of pockets for staying organized!
The Fashionista Baby Bag - tutorial with pictures on how to make a diaper bag
45 Awesome Free Bag Making Tutorials See diaper bag and backpack tutorials