71.   The Pennsylvania couple produce worm kits that can be bought by schools for fun science projects.

72.   The rifles and shotguns were wrapped in blankets, and curious classmates reported being told they were props for a science project.

73.   The telescope and other science projects were disclosed by Professor Lu Yongxiang, vice-president of the Chinese Academy of Sciences, the state-run Xinhua News Agency reported.

74.   The whirling blades look like some oversized science fair project.