How can I teach a toddler to blow his nose?

Little Remedies writes:

This is a really great question. What's the best way to teach a toddler, like a three year old, to blow his or her nose? It's almost like riding a bicycle, you just have to practice and practice. Make sure you show them how to close one nostril. Have them try to blow the tissue and make it move. Using a saline spray or mist will also help the mucus come out easier, so they'll feel more successful. But there's no big magic to this and it really is practice, practice, practice which as a parent you'll realize is a key to many skills.