Want to see in the dark? Of course you do! Now you can do it like a spy by making a pair of cheap thermal glasses.
Do you know these wonderfully cheap SSD1306 based OLED displays with the crispy display? For a while now the NodeMCU Lua firmware for the ESP8266 supports them
You can create a reactive LED coffee table using Arduino micro https://www.youtube.com/watch?v=fxkEPKGgv8o&feature=youtu.be