<mujoco>
<worldbody>
<body name="object" pos="0 0 1">
<freejoint name="free_joint"/>
<geom name="object_geom" type="box" size="0.1 0.1 0.1" rgba="0.3 0.3 0.8 1" mass="0.1"/>
</body>
</worldbody>
</mujoco>