Music box

The Music Box, owned by the Hysterical Dame, is the opposite side of the Storefront window portal

This portal was originally blocked due to the Hysterical Dame having misplaced the key. Slightly later in the adventure, she found it around the kneck of her teddy bear/knife. She promptly uses the key, finding Problem Sleuth looking through the Storefront window portal. She soon closed the box after seeing Madame Murel looking through her window. This action resulted in Problem Sleuth being killed by a monster.

The Music box was used for the second and last time when Ace Dick used the Storefront Portal to avoid falling to his death, which consequentially shrunk him due to the size-warping capabilities of window portals. The Music Box was then sliced in half by the Hysterical Dame, never to be used again.