Perpetual motion

The fourth volume, in which Llewellyn attempts to base a perpetual motion machine on Millie, the identity of Millie's father is revealed, the kids participate in a spelling bee, Avery dabbles in reality television, Ozy moonlights as a lab rat, Llewellyn launches another presidential campaign, and much more.

Source: Lulu.com, http://www.lulu.com/shop/dc-simpson/perpetual-motion-ozy-and-millie-2002-2003/paperback/product-944651.html