That's true, which is I'm sure why we newbies ask so many questions prior to trying things- to be sure we don't do something unsafe and learn the hard way. I know persoanlly, I've only given all natural apple sticks and hay (and those 'fruit flavored wood chews' from Petsmart that they came with). Vanilla seemed a logical possibility considering it's already a known safe use externally, and I thought Sami's querry a fun avenue to hypothetically explore for those interested in putting together their own toys- like myself. If it was deemed safe by the wise I'd give it a shot like I plan to do with rosehips and rolled oats.