Question

I'm trying to make a cigar box guitar for a school project, but I can't figure out what I should do for DIY tuning pegs (you can't use pre-made parts
except for the strings)

Answer 1

Small screws?

Answer 2

This site may have some ideas for you:

http://makezine.com/projects/make-21/cigar-box-guitar/

Answer 3

I had to do the same project. I took the top part off of pens, the part the u click in and out, and slipped them on toothpicks. I attached the toothpicks to the wooden base. Whenever I wanted to "Tune the guitar" I would turn the pen piece, and stick a glue dot around it to hold it in place. I hope this helped, if it makes you feel better I was the only person who got an A.