Probably all 30 years old have an attack of nostalgia when they remember what they did something cool in childhood and try to repeat it. I made a portable game console.

This is a box that contains:

Raspberry with a couple hundred games
Battery lasts up to 20 hours
Two controllers
HDMI cable

That is, everything you need to connect to the TV. The idea was that with such a thing you can come to the office or to a party and start playing with minimal effort.