Abstract: A transformable building block comprises a body configured to receive a connector post or other portion of another building element, an appendage movably coupled to the body, and a post configured to protrude from the body and retract into the body. Inserting a connector post into the body of the transformable building block may cause the appendage to move and the post to protrude from the body. Removing the connector post from the body may cause the post to retract into the body.

Abstract: A toy construction element includes a first face recessed from a second face by a recess height, a first peg extending from the second face, and an engaging member disposed on the first face. The first peg has a first peg height relative to the second face. The engaging member may include a column portion and a peg portion, wherein the column portion extends from a first end portion at the first face to a second end portion at which the peg portion is disposed. The column portion may have a column height substantially equal to the recess height, and the peg portion may have a peg portion height substantially equal to the first peg height. A toy construction element may be part of a toy construction assembly, in which an engaging member of the toy construction element connects to a hole defined by a flexible member.

Abstract: A transformable building block comprises a body configured to receive a connector post or other portion of another building element, an appendage movably coupled to the body, and a post configured to protrude from the body and retract into the body. Inserting a connector post into the body of the transformable building block may cause the appendage to move and the post to protrude from the body. Removing the connector post from the body may cause the post to retract into the body.

Abstract: A tool for separating blocks and other elements from an assembly of toy construction elements is disclosed. The tool may include a coupling end that can attach to pegs and/or openings in a block and is configured for easily prying off the block. The tool may include a moving member that can be used to configure the coupling end in two different configurations for coupling to either the top or bottom of a block.

Abstract: A toy construction element includes a first face recessed from a second face by a recess height, a first peg extending from the second face, and an engaging member disposed on the first face. The first peg has a first peg height relative to the second face. The engaging member may include a column portion and a peg portion, wherein the column portion extends from a first end portion at the first face to a second end portion at which the peg portion is disposed. The column portion may have a column height substantially equal to the recess height, and the peg portion may have a peg portion height substantially equal to the first peg height. A toy construction element may be part of a toy construction assembly, in which an engaging member of the toy construction element connects to a hole defined by a flexible member.