A Stage is a special building and space where you can place toys. Upgrade it to increase the toy space, coin storage, etc.

You cannot put more toys on a stage when the stage is full. Upgrade the stage to increase the toy space, or sell or move the placed toys to another place to make more space. You can also install more stages to place toys.

The Toy Ball Lab is a building where two toys can be combined to create a new Toy Ball.

The Toy Factory is a building for opening Toy Balls.
Upgrade the building to open multiple Toy Balls at the same time.

The Candy Factory is where you can produce various Candies. Each Candy has a different production price, production time, and final production amount.

The Toy Tower is a building that stores attribute energy.
It uses the attribute energy to help the toy reach higher levels.
If you build a Red Tower, the level limit of the red attribute toys gets lifted, resulting in further growth.

The Toy Box is a building to store unused toys. However, toys stored in the Toy Box cannot receive Candies or be used in other content. To use a toy, the toy needs to be moved to another location from the Toy Box.