You can do all kinds of fun things with Raspberry Pi and similar platforms. Thanks to the GeeekPi Raspberry Pi Cluster Case, you can build your own NAS server or Jetson Nano cluster. This case is compatible with a wide variety of Pi boards. It has a 120mm RGB LED fan and open sides for better heat precipitation.
The case holds your Pi boards but doesn’t block any of the ports, so you will have access to USB, HDMI, and GPIO ports for your projects. The fan included is driven by a 5V power supply.