Tiny bats to fill your belfry! These really can be made with any leftover yarn. Fingering weight will create a bat about 1” x 3.5”. Gauge is not important, but you will want a nice, firm fabric to keep the stuffing in.

Additional materials:
Small bit of stuffing - yarn scraps work well
Off-white embroidery thread or yarn for teeth
Two red eyes - small beads are perfect