This is a set of building blocks in a house-shaped case.
When you open the yellow roof and each wall, colorful parts appear inside.
There is a wide variety of shapes, including circles, triangles, squares, stairs, domes, stars, etc.
Just like a door chime rings when you press it, the door parts make a sound when you shake them.
In addition, the two oddly shaped parts have magnets attached to them, and when you put the two together, you can actually make a car.