I took a page out of Allison O's book from O My Family and attempted some DYI babylegs. Overall I'd have to say it was a great success--and it was as easy as she said it would be.
I went to target and bought a 3-pack of knee-highs (on clearance, thank you very much), then I cut off the feet and using a needle and tread ran a seam about a half inch from the bottom.
DIY babylegs: $4
Coordinating your babylegs, diaper and handmade sweater from grandma: priceless