Grooved supporting member for assisting in the construction of a card structure

A planar base member for assisting in the construction of a card structure comprising:

• a top surface;
• a bottom surface;
• a center;
• four edges;
• and
• a rigid groove between each of said four edges and the center of said planar base member for receiving at least one building card structure member;
• wherein said parallel to said four edges;
• wherein said groove is approximately half the length of said building card structure member;
• wherein said card structure member is loosely held by said groove;
• and
• wherein said groove is at an angle to the normal of said planar base member.

A kit for building a structure from planar stackable members comprising:

• a planar base member for supporting at least one planar stackable member comprising:
• a top surface;
• a bottom surface;
• a center;
• at least one edge;
• and
• at least one substantially straight groove between at least one edge and the center of said planar base member, said substantially straight groove parallel to said at least one edge in said planar base member for receiving a planar stackable member;
• and
• a plurality of planar stackable members;
• wherein said planar stackable members are loosely held in place in said structure by means selected from the group consisting of balance, friction, said planar base member, and combinations thereof.