My 2 boys are nearly 4 and 20 months. They constantly fight- well younger one hits, punches, shoves, nips, steels toys, etc etc from the older one. The older one usually winges and tells tales on younger one. The little one is still young and at that destructive phase but i was hoping 2 boys would get on. as they fight now will it always be like this? I'm hoping once the younger one is a bit older things may be a bit more harmonious.