--- a/gamelib/scenes/cryo.py	Sun Aug 22 20:28:24 2010 +0200
+++ b/gamelib/scenes/cryo.py	Sun Aug 22 22:07:45 2010 +0200
@@ -1,4 +1,7 @@
-from gamelib.state import Scene, Item
+"""Cryo room where the prisoner starts out."""
+
+from gamelib.state import Scene, Item, Thing
+
 
 class Cryo(Scene):
 
@@ -9,16 +12,19 @@
         super(Cryo, self).__init__(state)
         self.add_item(Triangle("triangle"))
         self.add_item(Square("square"))
+        self.add_thing(CryoUnitAlpha("cryo.unit.1", (20, 20, 400, 500)))
 
 
 class Triangle(Item):
-
     INVENTORY_IMAGE = "triangle.png"
 
 
 class Square(Item):
-
     INVENTORY_IMAGE = "square.png"
 
 
+class CryoUnitAlpha(Thing):
+    pass
+
+
 SCENES = [Cryo]

--- a/gamelib/state.py	Sun Aug 22 20:28:24 2010 +0200
+++ b/gamelib/state.py	Sun Aug 22 22:07:45 2010 +0200
@@ -79,6 +79,9 @@
     def add_item(self, item):
         self.state.add_item(item)
 
+    def add_thing(self, thing):
+        self.things[thing.name] = thing
+
     def draw_background(self, surface):
         surface.blit(self._background, (0, 0), None, BLEND_ADD)
 
@@ -94,11 +97,21 @@
 class Thing(object):
     """Base class for things in a scene that you can interact with."""
 
-    def __init__(self, rect):
+    def __init__(self, name, rect):
+        self.name = name
+        # area within scene that triggers calls to interact
         self.rect = rect
+        # these are set by set_scene
+        self.scene = None
+        self.state = None
         # TODO: add masks
         # TODO: add images
 
+    def set_scene(self, scene):
+        assert self.scene is None
+        self.scene = scene
+        self.state = scene.state
+
     def interact(self, item):
         pass