<mujocoinclude>
    <body childclass="bin_base" name="objA">
        <geom material="obj_green" size="0.02 0.02 0.02" type="box"/>

        <geom class="obj_col" size="0.02 0.02 0.02" type="box" mass=".1"/>
    </body>
</mujocoinclude>
