More than 3,000 children are born every year with a congenital limb deficiency in the United States alone. These children will change their prosthetics devices once every 6 months, making the purchase of a high-end prosthesis unaffordable for most families. Affordable 3D printers have spawned numerous customizable and very affordable prosthetic hand models. These devices can be modified to fit the children as they grow, at a relatively low price. However, these prosthetic hands leave a lot to be desired in terms of functionality. Most of these devices can only allow coarse finger control, placing it in stark contrast to commercial automatic hands. The Project Sparthan team is committed to taking the concept of modular prosthetics a step further, continuing to bridge the gap between expensive robotic arms and 3D printed prosthesis. This will be done through the design and development of Sparthan, a modular electronics kit, compatible with existing prosthetic hand models, which will enable intuitive hand control.