Summer camp ended weeks ago and our 3 year old still packs a bag for 'camp' every morning

She did a short morning camp at our clubhouse in May. Singing, clay, water play. It finished in early June. Every morning since, she packs her little bag with a bottle and a towel and asks if it's a camp day. Preschool hasn't filled that gap the way I hoped. Is there anything weekly around Financial District for a 3 year old that feels like that? Not a class with a syllabus, just a couple of hours of messy play with other kids. Weekends suit us best, I work around delivery dates.