Second Saturday: Mapping Secrets (with Invisible Ink!)

Visit the American Philosophical Society Museum from 12 p.m. - 3 p.m. on the second Saturday of the month this summer for free, hands-on activities geared towards families!

Could you hide a map in plain sight? Why does heat expose invisible ink?

We use maps to convey important information: where things are located, how to travel from one place to another, and what types of terrain you may find. While most maps are drawn to be as legible and clear as possible, some maps are used to conceal hidden locations and even secret codes during times of revolution. Come learn how to use invisible ink to create your own hidden map!

Every second Saturday of the month, May through September, the APS Museum will have free educational activities for families, individuals, and all visitors to enjoy.