If it was me I would have KUW focus on pushes and pulls/forces with toys. (But I take it that your mentor has told you to do materials) Perhaps your mentor should be informed that being a mentor isn't about making the student play a guessing game about what lessons should be about. Personally when I mentor a student I have them email all their planning to me and then I annotate it where they can improve and change. I also give them the resources we would use for the topics, it's not a treasure hunt. Songs: Here we go round the mulberry bush?