for a school site or booklet, a set of thirty-five linear round monochrome icon icons, color change in one click

angle apple arithmetic arrow atom bachelor ball bent board booklet botany brush cardiogram change chemistry click clock color crosses drawing education electron exclamation felt five gear geography globe graduate graph hat icon lamp language letter line linear mark master mathematics mechanics monochrome music musical note one paper paragraph pen pencil physics portfolio question round school set sheet singing site soccer stand statistics table target text thirty thought three tick toe two wall