The Brain Needs Intense Feedback
If you react positively to a situation, it helps your child's brain discern whether it's important to remember it. Unfortunately, the same is true for negative reactions from you. Ask anybody what some of their first memories are and you'll undoubtedly get a mix of good ones and bad ones.
Make an impression: Let your excitement show, whether it's for a movie you went to see as a family or for your child's T-ball game. And when it comes to the less happy stuff, trust your child will be okay even if he does recall tougher moments.