Artist-designers György and Juliet Kepes were part of a cadre of European expats who brought Bauhaus ideas stateside in the 1930s. Their grandson Janos Stone continues the Kepeses’ investigations of open-ended play with Haus: the Modern Child’s Playhouse. The tent unfolds in 60 flat-packed seconds and invites interaction—from puppetry to painting—thanks to its washable, 100 percent recyclable plastic walls.