This is how my 15 year old son got back at his 13 year old sister this April Fools Day.  She had (with help from her twin) put Saran Wrap over his door and food coloring on his deodorant.  He wanted to take a more destructive revenge but this was more fun.

His sister is a BIG Red Sox fan and takes great joy in hating the Yankees.

We'll see what she thinks of her room.