This week I did similar lessons with K-3rd, but adapted for the grade level. It was very interesting to watch the difference between the different grade levels and I think was valuable to all. Waves and energy are currently a 3rd grade science standard, but will soon be moving to first grade, so this is why I decided to use this activity with all K-3rd students.
What is a wave? We see waves in the ocean, but is that really the only type of wave?
Here are some items that students experimented with to make “waves”.
Here is also a video of Lego people forming a wave.
So what is the pattern we see?
Student drew a before diagram and after diagram of the pattern.