Although I have run the general concept of making these snacks on Shabbat, and some of my early experiments, by our Local Orthodox Rav, I do not have a mashgiach and do not run EVERY snack by a rabbi.  Accordingly, if you have any concerns about whether these snacks can be made on Shabbat, and what should be pre-prepared, I urge you to consult an authority of your choosing.  If you learn anything that is of concern (not a chumrah of your specific Rav but is a general halachic concern) please do notify me.