What is union square play?

Unfortunately, as an AI language model, I do not have access to current events or real-time information. However, I can provide general information about Union Square Park in New York City, which is a popular location for outdoor play. The park features a large plaza and a playground for children, as well as numerous benches and open spaces for games and recreation. Additionally, Union Square hosts several events and festivals throughout the year, including music performances, farmers' markets, and holiday celebrations.