Friends except when fighting

Callie and Chase do so well playing together and especially while I have been busy with Cole they have had some good times.  Until Callie doesn't want to play with Chase anymore and then Chase can't stand it and picks at her all the time.  Then they fight and he gets in trouble and it is a good time for all.  Some of the things they have been playing a lot together are dump trucks outside and jumping on our redneck trampoline.