Also a big fan of Legos (and so are my kids).
Highlights magazine is great for that age and can fill up some time.
Step-by-step drawing books can also be fun, and can usually be found at libraries: https://www.charlotteobserver.com/reviews/drawing-book-for-k...
Can also take her stargazing and teach her about constellations. There are mobile apps to help you find them, but books and searching for them yourselves is also fun.