I made these over the weekend for my kids. They knit up pretty quick on size 8 needles. The pattern only called for one color, but I used two to knit with for a varigated look.
One pair I sewed straight down the bottom, the other pair I sewed close in a "T" fashion. Both look fine, but the straight seam works better for longer feet!
My kids love these!
Pattern Source: http://www.geocities.com/lindaslists/kslippers.htm