Ruler for measuring kids height. If you move, just take it down and take it with you. I used a 1x8 piece of pine, Minwax "cherry" stain, and home address numbers from Home Depot. The lines were done with a black paint marker from Michaels. 1. Cut board to length. My kids will never be 7', so it didn't need to be too big. Sand it smooth. 2. Stain. I used 2 coats. 3. Measure the lines and mark with a pencil. Use a square to make the actual lines with the marker. 4. Attach the numbers.