20 years ago I used to have a free list that I compiled, second list was one that had a small Entrance charge and a third that was an expensive treat.
We would do free things daily and one or two medium treats depending on the weather.
Free things would be to visit a local animal farm (ours is free entry)
A stomp in the woods in wellies to find the biggest puddles. Or the biggest leaf, or the nicest stick to make into something. Or bird spotting with a book from the library.
We have costal walks. Free parking but it's a walk to the shore so that's part of our day. Drawing messages be on the stones and throwing them into the sea.
Feeding the squirrels monkey nuts at another park. They come right up. But watch the clever crows....they wait until the squirrels have buried the nuts then they dig them up.
Each time I take a picnic lunch .
I did 'dessert master chef' with them. They designed a dessert with a hand from me, we'd get ingredients when I planned my shop. Then an afternoon helping them to make their treats.
Judging is with friends or grandparents and everyone has constructive praise, no one loses. And everyone gets nice things to eat.
One for girls, flower fairies are very easy to make from pegs with a pipe cleaner. Colour paper and cut petal shapes, glue on. Bit of wool for hair and felt pens for face.
Play dough on the stove is another. If they are young less salt and some food colour.
If they are older then more salt and paint to get vivid colour. If you use the hot dough recipe it's just like the bought stuff and cheap.
Moderate activity would be swimming at the local
Pool. Visiting a museum, getting fish and chips lunch out after a walk along the beach. Lunchtime meal offers are cheap for children.
Taste have a free 90 day offer on right now with no obligation to continue. It helps make eating out with children a bit less expensive.