In the activity below, first graders were asked to group notes in sets of 4 beats. We introduce the term "bar lines" and used the small yellow noodles to represent them. Today we used only notes that fit in one beat like a quarter note (ta), barred eighth notes (titi) and a quarter rest (sh). Each noodle note has a note on one side and the corresponding rest on the other side.
In future lessons we'll use half notes and whole notes. The half notes are twice as long as the blue note pieces because they get two counts instead of one. The whole notes are four times longer than the blue note pieces because they get four counts.