Crap name, must actually call it something decent.
After that, I must do a costing. If the unit cost if more than any sane person would pay I have to give up on a project. This happens quite a lot. Decent ingredients are really rather expensive.
Then it's longevity I look at. I will make some and store them in the cupboard, fridge and freezer and see what the various shelf lives are. In general, a fridge KILLS cake, and it drives me bananas when people store it there. Fridges dry cake out. However, as these are totally enclosed they ought to be fine. I think. Hence the testing.
If all of these are positive, and to be frank I usually go back and tweak the method about a million times, I can finally look at selling them.
I think they'd be lovely for both the milkshake bar and the soft play centre. The down side is that there is a lot of plastic packaging. It can be put through the dishwasher and re-used, and is fully recyclable but it does go against the grain to have such a heavily packaged, non-biodegradable product.
Anyway, that's the latest experiment. What do you think?