Place your order by December 15, 10:00 am ET (New York) for delivery by December 24. All items will ship from the Museum within one week of order placement. Curbside pick up by appointment is now available! Please email [email protected] to schedule.
One of the classics: essential equipment for anyone living in 3-dimensional space. Its twisted double-tetrahedron is the simplest and most deeply symmetrical of its family.
