Robert Heim created an accurate model of the traditional German Christmas decoration known as Weihnachtspyramide, or the Christmas pyramid. It is a multi-tiered structure with a fan on top and candle-holders at the base. When the candles are lit, the warm air that rises to the top propels the fan and spins the figures on the platforms in the model. Although the Lego version won’t do well with the heat, it is certainly charming to look at and a great decorative piece.