Kids age four to 16 can still get in on the fun of the University of Colorado at Boulder's CU Science Discovery summer program of classes and wilderness camps. Space is still available in a number of the nearly 200 weeklong classes offered, including "Kids Chemistry," "Lego Structures," "High-Tech Expeditions," "Marble Madness," "Science Magic," "Physics for Fun," "Model Rockets," "Kid Pix," "Electronics for Girls," and many others.