Assembly Required

The builders must create a class A fire extinguisher, before going on to craft an all-season leaf blower that can also melt ice and snow.

Tim Allen and Richard Karn heat up the competition when they ask the makers to create a mobile BBQ grill with all the fixings. Before they can start cooking, they must first prove they can create fire by fabricating a brazing torch.

Tim Allen and Richard Karn challenge the makers' imaginations by having them build a do-it-all landscaping machine, but before they can tackle their yard work, they have to build a shock-absorbing food tray for a comfy recliner.

The makers are challenged to put their best paw forward and create the ultimate doghouse, but first they have to demonstrate their canine prowess by assembling a fully functioning doggy-door.

Tim Allen and Richard Karn put the maker's skills to the test when they have them create an exercise machine that's fully loaded with all the bells and whistles. The makers have to build a working treadmill to get their heart rates up.

Tim Allen and Richard Karn challenge the best makers from the nation to build the ultimate mini dump truck, complete with a claw capable of grabbing a log and crushing a garbage can.