Abstract: A portable motor skill development low beam formed of an elongated generally flat base having, on the upper surface, spaced apart, paralleled short vertical height ridges and an elongated beam member of generally inverted U-shaped cross-sectional configuration providing a top generally planar upper surface and integral, opposed, downwardly extending side portions each having a lower edge that rests upon the base member, the lower edges of the side portions being received by the base portion vertical ridges so that the beam member is supported on the base portion providing an upper surface for use by a gymnast, the beam member being easily detachable from the base member so that the device can be quickly disassembled for ease of transportation.