Transforming Construction Toy with an Extendable Roof Unit and Attic Room

The problem

Fixed dollhouses give children the same rooms every time they play. Once the layout is learned, the building offers little reason to change the setup. Adding more floors permanently makes the toy taller, heavier, and harder to store on a shelf. Separate expansion packs require extra boxes and parts that get lost. Buyers and brands need a single toy that changes its shape without loose pieces, offering different room heights for different figure sizes within one compact footprint.

The solution

The transforming construction toy solves this with a roof unit that carries its own supports.

1. A floor portion (28) and a ceiling portion (24) define a first room (22) with a set height dimension (H1).
2. A roof unit (30) sits above the ceiling portion. It contains at least one leg portion (32) that can retract upward into the roof or extend downward.
3. In the first configuration, the legs are fully retracted, and the roof unit rests directly on the ceiling portion, closing the building.
4. In the second configuration, the legs protrude downward from the roof unit and stand on the ceiling portion. This lifts the roof and defines a second room, or attic room (50), between the ceiling and the roof.
5. The second room has a height dimension (H2) smaller than the first room, creating a distinct space for play.
6. A storage ladder (70) is hidden on the back side of the ceiling portion. When released, it rotates down to the floor portion so figures can climb to the attic.

Who it is for

• Toy brands and licensors looking for a dollhouse or building playset that transforms without requiring separate add-on packs, keeping packaging compact.
• Amazon sellers and wholesalers sourcing home-play and club-use construction toys that offer multiple layouts in one box to appeal to parents wanting variety.
• Educational toy distributors supplying teaching aids for spatial reasoning, where changing room heights demonstrates scale and structure to children.
• Board-game and hobby clubs using physical building sets for tabletop scenarios, where a fold-open layout provides quick access to interior rooms.

How it works

The main parts

Operating steps

1. Open the building - swing the left side (LB) and right side (RB) apart on the hinge mechanism (40) to expose the rooms.
2. Retract the legs - push the leg portions (32) up into the roof unit (30). The holding portion keeps them stored. Place the roof unit directly on the ceiling portion (24) for the first configuration.
3. Extend the legs - pull the leg portions (32) down from the roof unit. They rotate on their rotating portions until they stand orthogonal to the ceiling.
4. Lock the outer roof - fit the locking portion of the outer roof portion (26) into the groove on the roof unit to secure the second configuration.
5. Deploy the ladder - release the engagement mechanism holding the storage ladder (70). The ladder’s own weight rotates it around the shaft until the lower end touches the floor portion (28).

Applications

Home play for children

Children playing at home use the toy to switch between a standard house and a taller building with an attic. The transformation keeps the play session active without needing extra parts from a separate box.

Teaching spatial concepts

In a classroom or teaching setting, instructors use the two configurations to show how changing support lengths alters room volume. The smaller height dimension of the attic compared to the main room gives a clear visual lesson in scale.

Tabletop and club scenarios

Hobby clubs use the hinged, fold-open layout for board-game-style storytelling or role-play. Opening both sides flat gives all players a clear view of the rooms to place figures and furniture.

Compact retail display

Wholesalers and retailers benefit from a toy that ships in its closed, two-layer configuration. The smaller box size saves shelf space while still offering a multi-room feature when opened by the buyer.

Where it is less suitable

• Outdoor sand or water tables - the hinge mechanisms, leaf springs, and locking grooves are designed for indoor home or club use, not wet environments.
• Heavy die-cast vehicle displays - the plastic legs and ceiling portion are sized for lightweight figures and furniture, not heavy metal models.
• Infant and toddler chew toys - the small rotating parts and engagement mechanisms are intended for older children who play with structured building sets.