The US Open is always a youngster-friendly affair, and particularly so on Kids' Day. The event, which honors the humanitarian legacy of 1968 US Open champ Arthur Ashe, features live music, interactive games, plenty of tennis instruction and chances for kids to play against each other and against touring pros, and appearances by top tennis stars and pop stars side by side. Previous iterations of Arthur Ashe Kids’ Day have included music from Flo Rida, American Authors, Ariana Grande and others. There have also been interactive and entertaining tennis-related activities, plus appearances by Serena Williams, Novak Djokovic and Rafael Nadal. Keep your eyes peeled for details about this year. Tickets are relatively inexpensive—cheap enough for budding fans to pay for out of their own allowance. For more information, visit arthurashekidsday.com.