diff --git a/src/Resources.h b/src/Resources.h
index 7fbc42a..f636dd7 100644
--- a/src/Resources.h
+++ b/src/Resources.h
@@ -1,3 +1,4 @@
+#pragma once
 #include "Common.h"
 #include <list>
 #include "UI.h"
@@ -9,4 +10,4 @@ class Resources
 public:
     static sf::Font font;
     static GameEngine* game;
-};
\ No newline at end of file
+};
diff --git a/src/UI.h b/src/UI.h
index b29e5c2..0b71a44 100644
--- a/src/UI.h
+++ b/src/UI.h
@@ -1281,8 +1281,10 @@ switch (target->derived_type())                         \
 
         // this would be a great use case for .tp_base
         if (!PyObject_IsInstance(o, (PyObject*)&PyUIFrameType) &&
-            //!PyObject_IsInstance(o, (PyObject*)&PyUISpriteType) &&
-            !PyObject_IsInstance(o, (PyObject*)&PyUICaptionType))
+            !PyObject_IsInstance(o, (PyObject*)&PyUISpriteType) &&
+            !PyObject_IsInstance(o, (PyObject*)&PyUICaptionType) // &&
+            //!PyObject_IsInstance(o, (PyObject*)&PyUIGridType)
+            )
         {
             PyErr_SetString(PyExc_TypeError, "Only Frame, Caption, Sprite, and Grid objects can be added to UICollection");
             return NULL;
@@ -1298,9 +1300,11 @@ switch (target->derived_type())                         \
             PyUICaptionObject* caption = (PyUICaptionObject*)o;
             self->data->push_back(caption->data);
         }
-        //if (PyObject_IsInstance(o, (PyObject*)&PyUISpriteType))
-        //{
-        //}
+        if (PyObject_IsInstance(o, (PyObject*)&PyUISpriteType))
+        {
+            PyUISpriteObject* sprite = (PyUISpriteObject*)o;
+            self->data->push_back(sprite->data);
+        }
 
         Py_INCREF(Py_None);
         return Py_None;