Platform Nine and Three Quarters

I am a huge Harry Potter fan. So in honor of the release of the next movie, we are showing Harry Potter and the Half-Blood Prince in our backyard on the 19th. We'll have a Honeydukes concessions table, and for potions, guests will visit Snape's Dungeon. We have a new fogger from Halloween that does short little bursts of steam, so I thought it would be perfect for guests to enter via the Hogwarts Express at platform nine and three quarters with an imaginary steam engine puffing away. I had an old piece of wood lying around, drilled holes, bought $1.12 can of red spray paint at Walmart, and printed, trimmed, and glued on the letters. And voila, anyone can do it! It should be fun.