Okay, someone needs to hire me to do a little boy party, because I am FILLED with great ideas - but I am fresh out of little boys. And, much as I love parties (and, for that matter, little boys), I'm just not willing to add a third heathen to our brood.
Got a race track of some sort at your house? If you have a boy, chances are good that you have more than one. Why not repurpose one of them as a cupcake display?
Paper plates and napkins, creatively arranged, make steering wheels.
You can serve kid-friendly beverages in gas cans. CLEAN ones, obviously. As in, buy new ones from Home Depot or Lowe's. THEN you can put gas in them - or not - AFTER THE PARTY. (This public service announcement brought to you by the Common Sense Police.)
Chocolate-covered mini donuts make perfect "Spare Tires" for a car party. Seriously. You don't have to do a thing to 'em.
This extension cord wreath would work for a car party or a construction party.
Click on the image below to enlarge it and marvel at the creativity behind these refreshment names (Wrecking Balls, Fill Dirt, Drill Bits, etc.).
And, finally, I give you . . . the CONEstruction pinata.
Seriously, somebody, put me out of my misery and let me plan your little boy's party. Otherwise, I may attempt to force one of these themes on my soon-to-be-twelve-year-old. And the ensuing battle will not be pretty.