The present invention is a horizontal base for stabilizing vertically extending walls comprising a tray surface elevated from said base, the tray surface defining at least one moulded canal of a pre-defined shape, the at least one moulded canal being defined to receive at least one of said vertically extending walls. The base is preferably used in arts and crafts endeavours and in particular, for improved efficiency in the construction of gingerbread-based structures such as gingerbread houses.