PURPOSE: To make improvements in interestingness as well as to enlarge a range of play combining both printing and decoding materials together, while installing a printing block free of slide motion in both directions, and a stamp part likewise free of sliding motion in vertical directions in the printing material, and opening each window part to a storage recess, free of inserting a printing card plate into the decoding material, and to the surface side of this material.

CONSTITUTION: A printing card plate 11 is mounted on a mount part 12 of a printing block 4 installed in a base 3 of a printing material 1. When, each pattern print part 17 is formed on a surface of the printing card plate 11 by a stamp surface 5a of a stamp part 5 pivotally supported on a support piece 16a free of rotation as sliding the printing block 4 in both directions. Next, it is housed in a storage recess 20 installed in a decoding material 2, peeping into conical members 26 and 27 set up in window parts 21, 22 with a clearance from right overhead. The print parts 17 are formed correspondingly so as to form alphabetic letters on the card plate.