there are some threads around here with more "boy" theme suggestions but for what I remember...
check out the superstore for; stickers, stamps, punches, chipboard...
geometric shapes, circles, boxes, squares, stars, brads, arrows, paisley, etc.
postage stamp motif, puzzle piece shape motif,
nature, animals, camping, fishing, fish, leaves, dinosaurs,
cars, trains, trucks, airplanes, bicycles, skating, skateboards,
toys, rockets, tools,
ok maybe not the tattoos