One of the most important ways that we experience our environment is by manipulating it: we push, pull, poke, and prod to test hypotheses about our surroundings. By observing how objects respond to forces that we control, we learn about their dynamics. Unfortunately, regular video does not afford this type of manipulation - it limits us to observing what was recorded. The goal of our work is to record objects in a way that captures not only their appearance, but their physical behavior as well.