You'll need to know chain stitch, slip stitch, single crochet and double crochet for most of these patterns. There is also a triple crochet and double triple used once or twice, and a long single crochet stitch which is illustrated with a video.
I love this little collection, because I love love love tiny animal appliques which are simple to make and so delicate they make you go "Awwwwww!" Crochet is so comfortable and comforting, and a bumblebee or a birdie from this collection will make a smile on a toddler's face. Dress up all kinds of things which these sweet appliques!
You'll need no. 3 crochet thread and size 1.75 and 2.00 mm thread crochet hooks. You may also use lightweight yarns and a small D hook.