craftgrrl | Naughty and nice blanket

I would like to ask for some suggestions please!

My best friends and I are doing a secret santa. The challenge is that you have to give a "nice" gift and a "naughty" gift and EACH gift has to be under $10.

I would really love to give my secret person a blanket and make one side the naughty side and the other side the nice side. Now the hard part, how to do this for under $20? I am a basic beginner at sewing, knitting and embroidering so one of those skills has to somehow come in handy but I would really love your help before I dive head first into this project! I'm thinking I can use a thrift store to my advantage too- I have a big trip planned this upcoming week so any ideas involving things I can find there would be awesome.

Thanks in advance!!