How to help your kids avoid meltdowns and tantrums when they’re out in public? TikTokker and parenting advocate Jackie Santillan, 40, shares the H.O.W. method—a simple way for parents to help prepare their children when they’re outside. The H.O.W. method is a simpler, modified version of the CHAMPs (Conversation, Help, Activity, Movement, and Participation) method, which…