Author and nature artist John Muir Laws blogs many interesting things at www.johnmuirlaws.com. One interesting recent post explains how to draw a frog step-by-step (the image below shows steps 4 and 17). He has also written about drawing insects, plants, and birds. Anyone interested in nature should take a look!
Laws also helped develop the CNPS Nature Journaling curriculum, which may be of interest to parents of young biologists.