I have planned for a short lesson that includes a dairy taste panel and a dairy sensory panel (it's at the end of my dairy science unit!). For the taste panel, I was going to do skim milk, 2%, whole, and probably soy. But I need ideas for the sensory panel. I want to put things in these samples that the students can smell or see, and that they will NOT ingest. I thought about bleach, but am looking for input for other samples. I'd like to have 3-4 for them to be able to smell, so it can't be something that you can only taste.