I've found that giant solar carrots are universally popular. I built the first one in 2003 and have since built a few more on consignment for motivated fans. The carrot 'top', peaking out of the ground, is offhand blown glass with a set of lights on the inside rim. These are sequenced and positioned so that light bounces down the glass and reflects off of
horizontal ridges formed into the surface, creating a pulsing effect as the carrot top pushes its way out of the ground.
Glow worms and butterflies adorn the leaves, providing some top light.