Disclosed are various embodiments of a mobile advertising display apparatus. In one example, among others, the apparatus can include a display enclosure that includes a first side, a second side, a front side, and a back side. The first side can have a slot, and the back side can have an aperture that enables for a manipulation of content to be moved through the slot. The apparatus can include a flexible connector that has a first end and a second end. The first end can be attached to the back side of the display enclosure and a clamp can be attached to the second end of the flexible connector.

An apparatus is configured to be used with a post-mountable sign. The apparatus includes identical first and second frame sections. Each of the first and second frame sections includes a first fastening element located at a first end thereof; a second fastening element located at a second end thereof; and a first recess between the first and second ends configured to accommodate the post. The first fastening element of the first frame section is configured to cooperate with the second fastening element of the second frame section. The first fastening element of the second frame section is configured to cooperate with the second fastening element of the first frame section. The identical first and second frame sections are configured to be fastened together to surround the sign. The first recess of each of the first and second frame sections is configured to be positioned adjacent the post.

An apparatus is configured to be used with a post-mountable sign. The apparatus includes identical first and second frame sections. Each of the first and second frame sections includes a first fastening element located at a first end thereof; a second fastening element located at a second end thereof; and a first recess between the first and second ends configured to accommodate the post. The first fastening element of the first frame section is configured to cooperate with the second fastening element of the second frame section. The first fastening element of the second frame section is configured to cooperate with the second fastening element of the first frame section. The identical first and second frame sections are configured to be fastened together to surround the sign. The first recess of each of the first and second frame sections is configured to be positioned adjacent the post.

A corrugated sign modification kit that includes a handheld cutting device with a handle with a first end, a second end, and a handle length separating the first and second ends, a first blade member, and a blade guide member. The first blade member is coupled to the handle and has a cutting edge that faces in a longitudinal direction of the handle, extends outwardly away from the handle, and has a width of less than approximately 1 inch separating its proximal and distal ends. The blade guide member is coupled to the distal end of the first blade member, is orientated in a substantially parallel direction to the longitudinal direction of the handle, and has a distal end protruding to a point in front of the cutting edge so as to define a channel to guide inserted objects within the channel to the cutting edge.

A display mounting system includes a plurality of display mounts. Each of the display mounts has an outer surface, an inner surface, a first side edge, a second side edge, a top side and a bottom side. The display mounts each comprising a resiliently compressible material. The plurality of the display mounts is pivotally coupled together and positionable such that the inner surfaces form a closed loop to receive and frictionally engage a post. An outer two of the display mounts is defined. A coupler releasably couples the first side edge of the one of the outer two of the display mounts to the second side edge of the other one of the outer two of the display mounts to releasably retain the display mounts on the post.