Customer Research
When I created a sample product, I asked some people what they thought of the Tinkercad design and how much might I be able to charge for it. I asked if I should make any changes to make the design to make it better. In this way I made minor iterations to each item.
I did my customer research at the digital showcase asking the kids who came how much they thought I could sell it for. I used this to decide how much to charge.
I put the result in a google sheet: