Build the Bases
Putting the appliances on raised bases with casters gives them extra height and mobility -- a big plus if you want to tuck appliances out of the way or even wheel them into the kitchen so the kids can cook just like Mom and Dad. For each base, cut four sections of 2x4: two pieces 7¾" long and two that are 10¾" long.
Screw the 2x4s together to form a square (Image 1). The shorter boards will butt up against the sides of the longer boards. Screw these squares to the storage cubes from the inside of the cube.
Attach one small cube and the taller cube with the openings facing to the front; these will be the oven and refrigerator.
Attach another small cube with the opening facing up; this will be the sink. Add a small caster at each corner of each base.
Optional: Staple a length of aluminum garden edging to the 2x4s to give it a finished look and create a faux kick plate (Image 2).