I am adamantly opposed to coloring sheets, but this might be okay to leave for a sub. Students could use warm colors on the top and cool on the bottom to reinforce the difference between warm and cool. 2nd and 3rd grade.
List of Cool Things to Draw for Kids - 125 Ideas of What to Draw — Looking for ideas of what to draw? Printable word lists of things to draw for Winter, Spring, Fall, Summer, Christmas, Easter, and Thanksgiving. Get Started #drawing #kidart http://upliftingplay.com/list-of-cool-things-to-draw/
Cool Science Experiments for Kids – Get your kids interested in STEM → science, technology, engineering, and math with these easy science projects using physics and chemistry. Create a glitter tornado, shine pennies then turn them green, and catch ice on a string using supplies you have around the house. Smart is the New Cool!