Kids that age bite because they are frustrated. Usually because they can't talk as well as they understand. They know what they want to say, such as, "I want that toy" but don't know how.
This is what worked for me. If you see them getting frustrated, intervene before they bite. If it's too late, remove them from the situation, comfort the victim first. The biter needs to see that biting gets the other kid attention. Then tell your kid that you understand that what they wanted but too bad and biting won't help. Like this, "Biting is not nice. I know you want that truck, but Joey is playing with it right now and you have to wait. Why don't you play with this car."
It's not an instant cure, it takes a few times but it works. As we speak, my former biter (now 2 1/2) is on the floor screaming "My turn" at his brother (annoying, yes but no one is hurt).
But serioulsy, hes gonna get booted out of daycare if he keeps biting.
Or you could shake a can filled with change....
