Having three boys I always need boyish birthday cards. When they were younger it was easy: Trains, Bugs, Toys, Robots. As they get closer to the tween/pre-teen age it's getting harder to make cards that met the requirements of boys.
When I saw the sketch challenge at Papercraft Star I was inspired.
I recently purchased the X-Treme Stamp Set from CTMH just for the purpose of making some boys cards. The paper is from Basic Grey:Oliver Paper Pad, Grunge Board by Tim Holtz, Cuttlebug texture plate.