UPDATE 1/26/2021: I have created a Wakelet collection of Valentine’s Day lesson that you can visit here.
Operation Valentine is an adorable project on Instructables that can be used for grades 3 and up to teach the basics of electrical circuits just in time for Valentine’s Day. You may recall the post that I did that included some of the Operation projects my co-worker, Kat Sauter, did with the 8th grade science teacher. The Instructables project from mathiemom is definitely more manageable with younger students. Maybe your students can make these for their Virtual Valentines projects, or in addition to some of these other STEM projects for the young at heart 🙂