I apologize

I have been racking my brain for days, and just cannot come up with the name of the wildlife experiment book I had. It was loaned out and never returned, so I just cannot seem to come up with it.
I will keep trying.
Start at your public library. I realize you want to use things in your home, but that is my best advice. you only need to go there once ever 2-4 weeks, whatever your library allows for checkout.
See what they have for books for science experiments with household items. That is where you start. It will give you ideas on what can be subsituted in experiment books for things you have in your house already.
But don't just do experiments for the sake of having a "Lab"--do things that make sense for what you are studying.
For Astronomy, I like "Exploring the Sky" by Richard Moeschl. Lots of activities that help in the understanding of our history of exploring the sky. And seriously, going outside at night and trying to identify constellations and the planets constitutes a "lab activity".
My daughter was an artist--I often had her draw what she was seeing in her science classes. That was a way for her to learn.
And for your non-scientist, astronomy, gardening, learning everything there is to know about the care and feeding of a pet, are all things that come under "science".
And there is SO much stuff on the internet these days. I know you can doo entire courses off what you find on the internet--because I wrote an astronomy course that included only what was available at our local library and on the internet.
My daughter did this astronomy course in high school (remember, she was the non-science artist). She went on to take an astronomy course in college and got an A, so she must have had an adequate background.
Good luck--and I am still thinking for the name of that book.