If you know about Peltier modules, a solid-state fridge seems like an easy project. Pump 12V into the module, include a heat sink and a fan. Then you are done, right? According to [Peltier Power], ...

Peltier elements are thermoelectric components capable of pumping heat from one end of the device to the other end based on the direction of current. An advanced Peltier element comprises several ...