Haha. Gotta love these old retro videogame ads. I mean look at the smile on that kids face! THANKS GAME KEEPER!
Here’s a look at something similar!
In all seriousness, I had something similar to this when I was young with my original Game Boy (which my mom purchased for me alongside amazing games Metroid II: Return of Samus and Zelda: Link’s Awakening) which fit over the screen and acted as both a magnifying glass and a light. I remember it being pretty cool and I liked the magnified view, although sometimes I’d remove it cause the game graphics were sharper without it… I do wish I had this case. It’s pretty neat…. but portable? Meh.