diff --git a/src/omero/plugins/obj.py b/src/omero/plugins/obj.py
index e9fd44226..ff24626a7 100755
--- a/src/omero/plugins/obj.py
+++ b/src/omero/plugins/obj.py
@@ -374,6 +374,7 @@ def on_go(self, ctx, args):
                                       + str(self.get_field(field)) + "\n")
                         except AttributeError:
                             pass
+            proxy = proxy.strip()
 
         self.tx_state.set_value(proxy, dest=self.tx_cmd.dest)
 
@@ -460,6 +461,62 @@ def on_go(self, ctx, args):
         self.tx_state.set_value(proxy, dest=self.tx_cmd.dest)
 
 
+class ParentsTxAction(NonFieldTxAction):
+
+    def on_go(self, ctx, args):
+        from omero.cmd import FindParents
+        import omero.callbacks
+
+        if len(self.tx_cmd.arg_list) < 3:
+            ctx.die(335, "usage: parents OBJ type [type ...]")
+
+        req = FindParents()
+        req.targetObjects = {self.kls: [self.obj.id.val]}
+        req.typesOfParents = self.tx_cmd.arg_list[2:]
+        handle = self.client.sf.submit(req)
+        cb = omero.callbacks.CmdCallbackI(self.client, handle)
+        cb.loop(8, 500)
+
+        rsp = cb.getResponse()
+        if isinstance(rsp, omero.cmd.ERR):
+            proxy = "failed: '%s'" % rsp.name
+        else:
+            proxy = ""
+            for kls, ids in rsp.parents.items():
+                proxy += (kls.split(".")[-1] + ":"
+                          + ",".join(str(id) for id in ids) + "\n")
+            proxy = proxy.strip()
+        self.tx_state.set_value(proxy, dest=self.tx_cmd.dest)
+
+
+class ChildrenTxAction(NonFieldTxAction):
+
+    def on_go(self, ctx, args):
+        from omero.cmd import FindChildren
+        import omero.callbacks
+
+        if len(self.tx_cmd.arg_list) < 3:
+            ctx.die(335, "usage: children OBJ type [type ...]")
+
+        req = FindChildren()
+        req.targetObjects = {self.kls: [self.obj.id.val]}
+        req.typesOfChildren = self.tx_cmd.arg_list[2:]
+        handle = self.client.sf.submit(req)
+        cb = omero.callbacks.CmdCallbackI(self.client, handle)
+        cb.loop(8, 500)
+
+        rsp = cb.getResponse()
+        if isinstance(rsp, omero.cmd.ERR):
+            proxy = "failed: '%s'" % rsp.name
+        else:
+            proxy = ""
+            for kls, ids in rsp.children.items():
+                proxy += (kls.split(".")[-1] + ":"
+                          + ",".join(str(id) for id in ids) + "\n")
+            proxy = proxy.strip()
+        self.tx_state.set_value(proxy, dest=self.tx_cmd.dest)
+
+
 class TxState(object):
 
     def __init__(self, ctx):
@@ -513,6 +570,12 @@ class ObjControl(BaseControl):
     Dataset:123
     $ omero obj get Dataset:123 description
 
+    $ bin/omero obj children Dataset:123 Image
+    Image:51,52
+    $ bin/omero obj parents Image:51 Dataset Fileset
+    Dataset:123
+    Fileset:51
+
     $ omero obj new MapAnnotation ns=example.com
     MapAnnotation:456
     $ omero obj map-set MapAnnotation:456 mapValue foo bar
@@ -548,7 +611,7 @@ def _configure(self, parser):
             "command", nargs="?",
             choices=("new", "update", "null",
                      "map-get", "map-set",
-                     "get", "list-get"),
+                     "get", "list-get", "parents", "children"),
             help="operation to be performed")
         parser.add_argument(
             "Class", nargs="?",
@@ -611,6 +674,10 @@ def parse(self, tx_state, arg_list=None, line=None):
             return ObjGetTxAction(tx_state, tx_cmd)
         elif tx_cmd.action == "list-get":
             return ListGetTxAction(tx_state, tx_cmd)
+        elif tx_cmd.action == "parents":
+            return ParentsTxAction(tx_state, tx_cmd)
+        elif tx_cmd.action == "children":
+            return ChildrenTxAction(tx_state, tx_cmd)
         else:
             raise self.ctx.die(100, "Unknown command: %s" % tx_cmd)
 
diff --git a/test/unit/clitest/test_obj.py b/test/unit/clitest/test_obj.py
index 3b48e179e..348be1c0c 100644
--- a/test/unit/clitest/test_obj.py
+++ b/test/unit/clitest/test_obj.py
@@ -20,7 +20,7 @@
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 """
-Test of the omero/plugins/tx.py module
+Test of the omero/plugins/obj.py module
 """
 
 from builtins import object