Pieces you need:

 2 large rectangles

 2 arches

2 triangles 

2 semi-circles

1 play mat

2 small rectangles

Steps:

✔️ Step 1: Place the 2 large rectangles beside each other standing tall touching side by side.

✔️ Step 2: Lay the playmat down in an L shape where the L part in the air is resting on the 2 large rectangles. This forms the roof and another wall.

✔️ Step 3: Place a semi-circle in an arch and lay it down to form the bottom of the third wall.

✔️ Step 4: Put the second arch on top of the arch/semi-circle wall to create the window.

✔️ Step 5: Place down the two small rectangles on each side of the entrance (opposite side from window) with the semi-circle on top to complete the door.

✔️ Step 6: Place the triangles on top the roof with their flat sides touching to form a complete triangle.