If you have an EBT card you can get in free or cheap to all the major museums as well as most of the arboretums and places like Longwood Gardens. You can take three others with you at the same rate. You can do this any day.

If it's a COVID era card you aren't active on anymore they have no way of checking and just let you use that. There's a similar thing at the opera and the orchestra also has community rush tickets.

https://www.art-reach.org/access-program/access-philly/access-admission-partners/