Finger puppets work up quickly and are a good introduction to crocheting amigurumi dolls and larger, stuffed animals. The pattern I used was easy to follow and the results are delightful, making the most jaded adult smile. They work well for singing Old McDonald.
http://www.crochetpatterncentral.com/patterns/farmyard_finger_puppets.php
The following images are my finger puppets
freedom crocheting 