<mujocoinclude>
    <body childclass="block_base">
      <geom material="block_wood" pos="0 0 .02" mesh="block"/>
      <geom class="block_col" pos="0 0 .02" size="0.02 0.02 0.02" type="box" mass=".1"
      	solimp="0.99 0.99 0.01" solref="0.01 1"/>
    </body>
</mujocoinclude>
