I asked my kids to tell me how these rhythms looked different than the rhythms we read during our last class. They said "Some of the beats have 2 ghosts". So I asked them what they thought would happen and their response was exactly what I wanted "there will be two sounds".
I didn't have any Halloween themed manipulatives but these worked. I had some cardstock that was cut into 8ths and some button shapes that had been donated. I separated them into baggies, each bag had 4 pieces of cardstock and 8 buttons. The cardstock is to represent the beat and the buttons the notes. These are nice because I can use them throughout the year. I think I will give each group 8 beats next time for a longer composing experience.