1 empty tuna fish can (clean and dry)
14-18 wooden clothespins
washi tape or decorative self-stick ribbon
She used decorative Washi tape but you could use self-adhesive ribbons, lace, etc. If you really want to keep them occupied let them paint the clothespins different colors with acrylic paint and let dry before clipping them around the empty tuna can.
An inexpensive & quick kid's craft project that is perfect for the classroom (school), church youth groups, daycare centers, girl scout groups, etc. You can find the wooden clothespin at the Dollar Store to keep costs down.