This do-it-anywhere guessing game helps reinforce number concepts. And it's a blast to play.

How many steps long is the hallway? Kids put their graph-making skills to work as they make a step map of their own house.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

This science fair project idea quantifies the effect of weather- in this case temperature and humidity- on musical instruments.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.