80's child, MC upbringing. Our days out were NT, castles, meet family at country beauty spot for picnic and paddle with our dingy, museums (very basic a few artefacts in glass cases, lots to read). Parish Council summer coach trip to the beach, also my parents were keen hikers so lots of walks. We did do paid days out like theme parks or playfarms but these were saved for once a year on holiday or birthday, we stayed in Youth Hostels or a cottage.
We always took picnics and a flask, ice creams were a treat, had a pub meal for my Dad's birthday and a big family meal out for Mothering Sunday, Chinese takeaway once a year on mum's birthday, but did get fish and chips regularly when I was a teen. I've adopted this with my own children, we rarely buy food or drink on days out, I'd rather save the money for another day out!
When I was older we did go bowling and cinema, laser tag, ice skating, but these were once maybe twice a year each. Swimming a few times a year.
Our children are quite young still but we try to keep this approach and limit paid activities while they're happy with the park and an ice cream, plus it's lovely seeing how excited they get when we do something out of the ordinary