The key in Roblox Dolly appears to be behind the puzzle sequence in the hospital area, and one walkthrough says you find the first key in an open file cabinet after solving earlier steps like the roses, books, scissors box, and flashlight wall clue. Another source says the game’s main locked door is opened by solving several puzzles to obtain the key, which matches that progression.

What to do

  1. Finish the early room puzzles first.
  2. Use the flashlight on the wall to reveal hidden clues.
  3. Check the open file cabinet for the first key.

Helpful clue trail

  • Put the roses in order on the potted plant.
  • Collect and place the books correctly on the shelves.
  • Grab the scissors from the box.
  • Shine the flashlight on the wall for the hidden message.
  • Open the file cabinet to get the key.

The exact spot can vary depending on where you are in the game, but the walkthrough evidence points to the file cabinet as the key location after the puzzle chain.