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Materials Disposable plastic or paper cups (one eight-ounce and one 16-ounce size) Scissors Adult helper Balloons (2) Toilet paper Duct...

Materials Lanterns can be made from many different materials. Be creative and use materials you have easy access to, including items...

Introduction If you live where there is snow, it can be fun to play in it for a while—but it can...

Introduction Solar power is power we get from the sun. Unlike fossil fuels, which can cause significant pollution and emit greenhouse gases when...

In ancient Egypt, the temple priests had to perform religious rituals at certain times of the day, so accurate timekeeping...