Nature study around here at the moment consists of reading from the book The Wonderland of Nature and, ummm, hanging out in nature. Even if it's just our own back yard.
Preferably with a sketchbook.
And if no-one wants to come stop drawing when you're done...? Take along another book for a read-aloud session. Our current choice - The Heroes by Charles Kingsley.
What does Nature Study (or Natural Science) look like at your place?