That's what they say, right? Not so much, according to parents on the forum. In a poll asking what age was worst regarding throwing tantrums and the like, 34 percent have voted that it's actually their threes who engage in this the most. As new forum member klegal1 put it, "I've had the same experience as many of you - 2 1/2 to 3 1/2 has been the tantrum phase. My daughter potty trained late (around age 3) and tantrums and potty training went hand-in-hand for us."