It aims to teach high schoolers about mental health.
Bryan Stewart had a machete-style knife that had the word "kindness" written on it.
Kelsey Rae Zwick posted on Facebook details of the act of kindness.
"I have shared your letter with my staff, and they are working to see what help they can provide," Trump wrote back to the 8-year-old boy.
Perfectionists should consider talking to themselves about their mistakes as they might to a friend, one expert says.