Suminagashi Marbling Kit

Six 12 ml bottles of Boku Undo's marbling ink in red, yellow, orange, blue, green, and black, with paper dots and instructions. A kid touches ink to a tray of plain water, blows the rings into patterns, and lays a sheet of paper on top to lift the print. Suminagashi, or "floating ink," is a Japanese paper art that goes back centuries.

One of the oldest Japanese paper arts, and all it needs is water and paper. Every print comes out different, and they're pretty enough to frame.