A digital toy kit includes a picture book and a digital printing toy. At least one of the pages on the picture book includes one or more pictures and words. The digital printing toy includes a frame member that has a cavity, an ink jet printing head that has one or more nozzles, a memory storing a plurality of objects, a display area, a selection button operative to select an object, and a printing control circuit. The ink jet printing head can be activated to move inside the cavity of the frame member when it is pressed against a chosen page on the picture book. The printing control circuit controls the nozzles on ink jet printing head to project an ink pattern on the chosen page on the picture book when the ink jet printing head moves inside the cavity of the frame member.