These Web applications give students the chance to perform physical science experiments over and over, from anywhere with Internet access. As in a physical lab, the performance of the student will determine the results of the experiment. While not a replacement for all in-lab exercises, the virtual version can provide extra practice and guidance. There is no pressure to “get it right” on the first run, and mistakes are allowable because the technology lends itself to no-cost repetition. It also may prove a smart solution to rekindling the American public’s interest in the scientific.