Pair of pajama pants
Optional but very helpful tools:
Rotary cutter (scissors of course will work but I cannot reccomend a rotary cutter enough!)
Sewing machine (everything you can sew on a machine can be sewn by hand.)
Gathering foot (If your machine shirrs with elastic you can do that too, if you cannot do either you can hand ruffle it takes a bit more time but not much.
Quilting guide (Super helpful in keeping gathering stitches somewhat straight)