14-year-old Vinisha Umashankar rides the solar-powered iron cart that she designed in Tiruvannamalai, India. Courtesy Vinisha Umashankar. By Abhishyant Kidangoor. September 23, 2021 7:04 AM EDT.

This solar clock was built using a lot of salvaged parts. We find it interesting that [Nereus] combined a ring of storage capacitors with a power cell (translated) to create a hybrid energy storage… ...