In addition to all the reading I've been doing, one thing I've been working on lately is creating some worksheets to go with various "Let's Read and Find Out Science" books, which series is a favorite of DD (8).
Here are a couple for What Color is Camouflage? by Carolyn Otto (author) and Megan Lloyd (illustrator):
What’s Your Color
What Color is Camouflage
For copywork to go along with this book I'd suggest the following sentences (from the same book):
Camouflage can be a certain color, or pattern of colors, or a special shape that fools the eye. Animal camouflage is a kind of disguise. It makes an animal hard to see.