Abstract: A simplified form of toy construction set, in which individual tile sections of molded pulp material are joined flexibly and reversibly. Molded tile elements are fabricated with a plurality of grooves, pockets and holes that act as receiving surfaces for assembly with elements that simulate roads and other features and permit the integration of other three-dimensional structural elements. The tile design permits representation of many different three-dimensional environments at different effective scales, with the ability to readily switch between these environments as desired during play.