Cut out 2 pieces of felt to cover your finger. Make sure that the felt pieces are slightly larger than your finger.
Sew them together at the edges, leaving enough room for your finger. If there is extra felt on the outside of the seam you just made, then cut it off. Do not cut to close to the edge, though. Afterwards, pull it inside out so the extra felt does not show.
Go crazy with googly eyes, markers and other small accessories to decorate it!