So, you want to know the secret to green glass doors? (Read how to play here.) You’re really really sure you want to know? Because you’re cheating yourself out of the fun if you do…

You’re still here?

OK, fine. Here it is: any word that is spelled with a double letter can go through the green glass doors, but any word that isn’t spelled with a double letter can’t (get the title of the game now?).

So, some things that could go through the green glass doors:

  • grass, but not flowers
  • a happy person, but not a sad person
  • mushrooms, but not a fungus
  • feet, but not toes
  • overalls, but not blue jeans
  • apples, but not bananas

Get the idea? It often takes so long for people to figure out because they focus on the relationship of the things named in the sentence rather than the spelling, which is why it’s fun for the players who know the secret to say phrases like the ones below, with objects that are related to each other in different ways:

  • a rabbit, but not a hare (two similar objects)
  • the moon, but not the sun (two opposites)
  • glass, but not a window (something that’s part of something else)
  • a hammer, but not a nail (two related objects)
  • pepper, but not salt (two things that make a pair)
  • a pineapple, but not an orange (two things from the same category)
  • a poodle, but not a dog (but a poodle IS a dog!)

“Hints” like these are sure to confuse players even more and prolong the oh-so-entertaining game. So now that you know the secret, use it wisely and have fun!


    1. Haha, our high school basketball team used to play this on the bus to away games. It drove the players who didn’t know the answer crazy. It took me at least a year before I figured it out…

    1. You know, actually (and this is putting a lot of thought into it), I think this clue would be too much of a hint and would make it too easy for the guessers. Because “kid” and “kiddo” mean the same thing, the only difference is the spelling. That would clue the guessers in on the fact that the spelling matters most. That’s of course not what we want; we want the guessing to go on as infuriatingly long as possible 😉

  1. Before playing, I tell my students that if they figure it out, dont shout it out. Then we can continue and they are now in on it too. To let me know that they know the solition, they tell me 3 things in a row that may go, and 1 that can not. Awesome game! And I, Mr Seefeld can go even though teachers are not allowed through!

    Ive pondered other games like this with the same idea because the thrill og GGD may only be experienced once in a lifetime. True Blue Gate was my best one. Can you guess the rule now that you know green glass doors solution?

    1. Haha, that’s great. My best guess on True Blue Gate is words with a silent E? There’s also the game Going on a Picnic where players can make up their own rule each round. It’s not quite the same as Green Glass Doors, but it’s nice because you can keep playing again and again. Thanks for sharing, Mr. Seefeld!

  2. There’s a school with a roof, but no ceiling. No students either, but teenagers.
    There’s sleep but no bed, though there is a mattress. Lol

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