Tonka trucks are known for their toughness. Now there's one that's man-sized. Aside from the brand-heavy paint job, the first thing you notice about the Toyota Tonka 4Runner Concept is the wheels. And for good reason: they're bright yellow 20-inch Ultra Motorsports wrapped in 38-inch off-road tires, made all the more conspicuous by the 10-inch Bulletproof Suspension lift kit. Bulletproof also supplied the custom welded bumpers, ladders, side steps, and roof rack, the latter of which holds a pop-up tent. Sadly, it's only a concept, so you've no better chance of driving this one around than you do the yellow dump trucks in the toy aisle.