Just fill up the house or garden with red and yellow balloons and cardboard ladders.
Make this fabulous fire-truck if you have the materials and enough time!

Have a large cardboard box (the bigger the better) and cut off half of the top part. Cut a rectangular opening on the front side of the box (that is, the part that remained complete) to form the windshield. Attach the cut part below the windshield to form the truck’s engine. Paint the truck red and decorate with ladders and hoses. Use pie plates for the headlights. Provide the children with red fire chief hats and watch them have lots of fun riding the fire truck!