Prince William and Kate Middleton kicked off Children's Mental Health Week by visiting Mitchell Brook Primary School in London. The royal couple was all smiles as they attended the Place2Be assembly as part of their Heads Together campaign. Not only did they mingle with a few adorable students on stage as they presented a Place2Be "Kindness Cup," but Kate also opened up about her own children during the event. "My parents taught me about the importance of qualities like kindness, respect, and honesty," she said. "I realize how central values like these have been to me throughout my life. That is why William and I want to teach our little children, George and Charlotte, just how important these things are as they grow up." While the two will undoubtedly pop up at more events this week to talk about serious issues, they've also already managed to squeeze in some fun. William, Kate, and Prince Harry showed off their competitive sides during a charity run.