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Many people get water from a source deep underground, called groundwater.

This fun and simple hands-on astronomy activity lets learners experiment with marbles and weights to discover some basics about gravity and black holes.

Discover how a refracting telescope works by making one from scratch using common items. This telescope won't have a tube so the learner can see how an image is formed inside the telescope.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

This fun and simple hands-on astronomy activity lets learners imagine what would happen if our Sun were replaced with a black hole.