This research aims to (i) develop upper-limb prostheses for young children that work better and are easier to use, and (ii) better understand the real-world consequences of peripheral nerve injury to the hand, and associated brain changes. This requires high-precision recording of natural hand movements. Support from the Welsh Government Ser Cymru III Enhancing Competitiveness Infrastructure Award was used to purchase a state-of-the-art motion-capture system to enable this research.