My Idea: Fitted Flat Sheet

The toddler bedding that I got for Sophie had a flat sheet as well as the fitted sheet.  The coolest thing was that the flat sheet had elastic in one end so it would stay in place.  I asked my mom to take the elastic out of one of Sophie's old crib sheet and add a hem.  It was short but it worked just fine.

Now, I just have to figure out how to do it for my sheets.