A first cover member, which is divided into a first portion, a second portion folded with the first portion, and a third portion folded over the second portion, the first cover member being made of fiber; A first inner member attached to the first portion to form a first receiving space; A second inner member attached to the second portion to form a second receiving space; A third inner member attached to the third portion to form a third containing space; A first fixing member fixed to the back surface of the third portion and elongated in the longitudinal direction; And a second fixing member fixed on the upper surface of the first inner member and elongated in the transverse direction and being detached from the first fixing member, wherein the first portion, the second portion, The first fixing member and the second fixing member are attached to each other when the first portion is folded into the second portion in a state in which the third portion is folded into the second portion, A second opening is formed in the second accommodating space, and a play board having a rubber magnet plate attached on one side thereof is housed in the second accommodating space, and a play board, which is adjacent to the second opening, And the second inner member is fixed to an upper portion of the second inner member and an upper portion of the second inner member is fixed to the upper portion of the second inner member, The fixed ball The second inner member is formed of a net, and the second inner member is formed of a net, and the second inner member is formed of a mesh, Wherein the rubber magnet plate is arranged such that N poles and S poles are alternately arranged in the longitudinal direction, the first paper and the plurality of first rubber magnets are housed in the first housing space, and the first paper and the plurality The play paper is fixed to the outer surface of the second inner member by the plurality of first rubber magnets and the play board when the first rubber magnet of the first rubber magnet is taken out.
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