A few years ago my BFF and I did a class at her daughters school on a quick little card holder with a button sewn on for life experience class. They sewed the card holder then turned it right side out pressed it and then had to thread a NEEDLE! and hand sew a button on. They were wowed with the project and we had 2 hand cranks and one mechanical and one computerized machine so they were able to see the progression of technology. The hand cranks were a smash hit since they only sewed as fast as they turned the crank.