1. Review the provided drawings to understand the clubhouse design and dimensions.
2. Cut the 2x4 lumber to create the base frame: four pieces for the perimeter and additional pieces for floor support.
3. Assemble the base frame using wood screws and wood glue for added strength.
4. Cut plywood sheets for the floor, walls, roof, and door according to the drawing dimensions.
5. Attach the plywood floor to the base frame securely.
6. Assemble the walls by screwing together the plywood panels and reinforcing with 2x4 supports as shown in the drawings.
7. Cut out a window opening in one wall panel and fix the plastic/plexiglass sheet using screws or adhesive.
8. Attach the walls to the floor frame.
9. Build the roof frame from 2x4s and cover it with plywood, ensuring proper slope for rain runoff.
10. Install the roof onto the walls and secure with screws.
11. Construct the door panel, attach hinges, and mount it in the door opening.
12. Sand all surfaces to prevent splinters.
13. Paint or stain the entire clubhouse with exterior-grade finish for weather protection.
14. Allow paint/stain to dry completely before letting children play inside.
15. Optionally, add decorative touches such as curtains, flower boxes, or a chalkboard on the exterior.