The idea I decided to make a prototype of was the sewing kit. I liked the personalization it provided and I was fond of it from the moment I conceived it.
fig (1) initial prototype sketch
To create the prototype I went to the nearby Walmart. After purchasing 5 cans of spray paint an SD card, and getting IDed I purchased the required fabric. While it is a prototype and does not have to be exactly what the final product would be I tried to get as close as possible. This resulted in me purchasing a stretchy and soft jersey style cotton and white mesh to provide support. After accidentally cutting the fabric from the center of the material and spilling a pack of 25 sewing needles I had the sewing materials prepared. I put some sewing needles in the bag (secured not just loose needles) and my tape measure as a proof of concept. A measuring tape would be included in the bag to take your own measurements.
fig (2) the initial prototype
fig (3) what it looks like out of the bag