Cut out some cardboard in the shape of a hand mirror. Cut out some aluminum foil in the size and shape that will fit the cardboard cut-outs. I used a glue stick to adhere the foil to the cardboard, and it worked really well to smooth down the foil.
I think these magic mirrors could be made a lot better than I did here. I didn’t have good scissors to cut the cardboard so they are far from perfect. A box knife would work a lot better! They also could be decorated with stickers, glitter, and painted for another project.
Anyway, It beats having to supervise them with real mirrors. Of course, it doesn’t work as a real mirror but it’s still fun for pretend… and it’s basically free to make if you already have the materials on hand!