Sephora and I have been making treats for the girls lately and this is a list we frequently refer to when coming up with a recipe.
Raw Bread Dough (yeast)
Onions (and Onion Powder)
Xylitol (such as in gum or candy)
Pits from any fruits
Potato Leaves, Stems and Raw Potatoes
Tea or other caffeine products
Tomato leaves and stems