Circuit boundary for radio-controlled automobile, has identical elongated units made of plastic, colored and formed around thread, and curve shaped ends to permit radio-controlled automobile to move between elongated units

摘要

The circuit boundary has identical elongated units (1) made of plastic, colored and formed around a thread (3). Curve shaped ends (2) permit a radio-controlled automobile to move between the elongated units, where top side of boundary is flat. The ends are provided with brackets for combining a set of boundaries so as to extend a circuit for the radio-controlled automobile.