The Moving Box Puzzle, Part 2

Inside the security bag is another letter. It reads:

They are still outside. The four numbers I showed you were more than numbers. View them in a different way. (But you need not form the shapes again.)

First letter in the word: Kitchen.
Second letter in the word: Bathroom.
Third letter in the word: Den.
Fourth letter in the word: Storage.

The audience reads the clue found inside the locked bag.

The number 3 is the letter E.

David: This part of the puzzle really highlighted the differences in how people think. For some, this was a totally intuitive puzzle, and they shouted out "It's 'bell!'" immediately after hearing "the four numbers I showed you were more than numbers." Others needed to write out the numbers, and rotate the page to see how they  could also be seen as letters. Another possible solution, which only one audience tried, was simply to go through the boxes near the fireplace to find an object, without worrying about knowing in advance what they were looking for. The bell was the only object in any of the boxes.

Several audiences looked at the clue in a different way, and thought "First letter in the word: Kitchen" meant "K." Using this method results in the gibberish "KANR", which one audience, to our surprise, interpreted as "can opener." There was in fact a bottle opener on the table, so this audience created their own red herring. They were about to use the can opener to pop open a bottle of beer being used as a prop, when someone in the audience reread the clue and realized they were going in the wrong direction.