The Problem of Rolling Items on a Dirt Ground Only Applies When Playing Games or Using Toy Cars;
Lettering, numbers, pictures that are part of a cookie or cake itself. (It's all one dough).
מבטל כלי מהיכנו (nullifying a vessel from its normal usage). Putting a כלי (utensil/vessel) under candles to catch oil, to catch the candle and...