Ruffle Bags - can be made in three different sizes. They are perfect for everyday use (small/medium size) and overnight/weekend use(medium/large size)
They are even great to use as a non-traditional baby diaper bag. I use my small one most days to hold a diaper or two and the bare essentials.

Crayon Totes - can be customized to your favorite art supply. Instead of crayons, how about pencils or paint brushes?