What is this engineering task?

We had to create a product based on one of the four criteria: a toy that converts energy, a device that is safe and sustainable? A device that transfers power, but appealing at the same time.

I was thinking about a couple of ideas, for example, an electrical nerf gun, or a toy car, but as I scroll through youtube, something caught my eye, it was a string launcher. It was unique, appealing, and fit the criteria.

Target

I’ve found the string launcher to be a fascinating project. I’ve found some pros and cons about the product. Firstly, it is a very unique project, therefore, there are very few videos and explanations made. However, Isb does have all the materials required so it is possible. The process isn’t really hard, however, the measurements have to be measured precisely. Also, the String launcher matches all the criteria, my main audience will be students who are interested in something new to play with, different from the toys they normally play with.