How Does a Caterpillar Become a Butterfly?

This title explains what a chrysalis is, how a new butterfly breaks out of its cocoon and more. It is suitable for children aged 7 and over. How does a caterpillar turn into a beautiful butterfly? How much must it eat before it changes? What is a chrysalis? How does a new butterfly break out of its cocoon? Is it true that butterflies can taste with their feet? Budding scientists will delight in following this favourite creature's lifecycle and discovering the role it plays in nature.