Investing in a decent set of plyo boxes is a great way to get your aerobic exercise to the next level. The Alpha Strong Plyo Box are worth a look. They have a trapezoid shape, made from 3/4″ birch plywood. They are available in 6″, 12″, 18″, 24″, and 30″ sizes. They are easy to assemble as you will need only a drill.
These boxes have handles carved into the sides, so you can easily move them around.