My daughter is almost three and she throws teenager style tantrums complete with screaming and slamming doors. I just ignore them and she comes out when she's done. For the most part, my kids don't throw tantrums because they learned early on that they don't get any results. I let them cry and yell in their bedroom until they calm down and then they come out. They don't get their way and they don't get attention from me during the tantrums.At this age, tantrums are pretty normal, especially when there are big changes like going to or coming out of day care. Any time there is a big change or a new stress kids will act out.One way I avoid tantrums with my kids is to let them make as many decisions as possible. Having some control in their lives makes them more likely to follow your rules. I let me kids choose between two outfits in the morning, two different snacks, milk or juice, etc. Any small decisions they can make will have a big impact on their behavior.