I’m sure you have noticed, but I am a huge fan of visual notes for teaching the NGSS. The standards emphasize less memorization of definitions and more emphasis on interconnectedness of concepts. Doodle notes provide visual triggers that help kids conceptualize the 3D learning we are doing in our classrooms.
Creating doodle notes for science has been a passion of mine for years. In the process I have found that I am regularly searching for doodle clip art that helps with the flow of each note page. Sometimes I just cannot find what I need! SO… I have created a set of personal (and limited commercial) use doodle graphics for teachers like me to use in creating their note sheets. There are some freebie png files here for you to use, but if dig the doodles the full set is available for purchase too!