This is simple for anyone who knows their produce and animals, except try not to use the obvious off the top of your head. If you need wikipedia then it kills the purpose. i.e. If I began with A is for APPLE, APE, then I used little thought. Produce can be a veggie or a fruit. Animals can't be insects. So I will start with the letter A: APRICOT AND AARDVARK Next is B and so on. Good luck, on your ingenuity.