What a great topic!
I love:
Cuddling up in the hammock outside (sometimes when it's raining - hammock is under cover :) and reading books wrapped in a blanket if it's chilly.
Finding all the things daughter hasn't played with for ages and playing in her bedroom with them.
Making a kite out of a plastic bag and flying it on a windy day.
Putting on gumboots and going pinecone hunting.
Having 40+ hairclips put in my hair as we play 'hair dressers'.
Playing 'sleep over' on the trampoline. We get to read books again and then cuddle up for as long as she'll stay still :)
Going to the library and doing all the big floor puzzles.