How often does Mommy Poppins update its NYC event listings?

I'm sorry, but the documents provided don't specify how often Mommy Poppins updates its NYC event listings. However, given that they have a dedicated activity calendar and regularly post about upcoming events, it's likely that they update their listings frequently to provide the most current information. If you want the most accurate details, I would recommend checking their website or social media channels regularly. Is there a specific type of event you're interested in?