I got the supplies at the dollar store (and from my stash).
1 or 2 sheets of white poster board, $1 ($.50 each at Dollar Tree)
Clean clothes to trace, on hand
Paint and paintbrushes, on hand
1/4" elastic, $1 or so
Stapler and staples
Headband (optional), on hand or $1
Total Cost: $2 and up
Time for construction: About 1 hour, including paint drying time.
Step 1: Step 1: Trace Clothing
You can trace any clothing you want. Just remember to draw on a couple of strategically-located rectangular "tabs" - at shoulders and sides. This is crucial for selling the paper doll idea!
After you're done tracing, don't forget to draw on realistic details like buttons, zippers, bows, lace, seams, etc.
Trace over pencil with a thick-tipped black marker.