Last week, we travelled together with our families to the New York Hall of Science, in Queens, where Charles and Ray Eames’s Mathematica exhibit, originally created for IBM in the 1960s, is on permanent display. It’s a masterpiece of lo-fi installation design, not a screen to be found, just clear, hands-on exhibits that illustrate concepts with creativity and without pandering. 

The day after our visit, my daughter wanted to return.