Being a shift worker I spent a lot of time with my kids preschool, managed to work too old fashioned these days I know.
During the day was easy, feed, change, change, feed , nap for the kids, feed, change. In between that simple walks with the dog, pop down to the beach buf a lot of the time was spent in Alnwick Gardens using a season pass. Walk down there and they could crawl, walk and run around safely whilst I chilled in the sun watching them. Also took them places for lunch they’ve loved that from a young age, cafes pubs or ice cream parlours.
Just remember what you enjoyed as a kid, nothing’s changed much.