Develops sudden fears and phobias. Resists taking naps but needs one. Can control bladder and bowel functions, but still has accidents. May stammer and stutter when upset or excited. Nose picking, fingernail biting, and tumbsucking reach a peak.
Child also learns to spit.
Prime time for imaginary friends. Time to grow. Remember, a 3 year old is a baby that looks like a child. Don't force threes to be bigger than they can be at the moment. An enabling environment.