What's the border between food and not food?

I and my old colleague visited my other old colleague's house today.

We're more than old colleagues, even friends. I feel like they are my older sisters. We went to a supermarket on the way to her flat and bought some drinks, meals, and snacks.

Mostly we're just eating, drinking or talking but we also tried to make "sweets" ourselves. It didn't mean we cooked, we actual made sweets. The package were like kit of making sweets. One of them was for making 'pizzas and baked potatoes', the other was for making 'lunch box', and other was making chocolate look like mash-looms. Although these were for children, that's really, really hard to make; Mixing powder and water, warming up some parts in the microwave, kneading to make the shape, heating in a water-bath to chocolate melt, and so on. This was such a crazy and interesting experience but actually so much fun! It took almost 2hours and everything was not delicious at all even disgusting except chocolate things. Yet, we really enjoy this such unique event!