I have a 6 year old boy and 4 year old girl. Two boys those ages would be hard. The 6 year old definitely tries my patience every. single. day. We've been making an effort to not yell for a few months now and it actually seems to help his behavior. Lots of positive reinforcement, rewards for good behavior etc. He loves "surprising" us with good deeds (ie. shower is always a problem and he'll "sneakily" shower with my husband to play a trick on me) and we play along incessantly. FCPS recently had a webinar with this guy (
https://celebratecalm.com) and it was very, very good and I've been trying to implement some of his tips.