diff --git a/_subsections/sec04/lesson-02.org b/_subsections/sec04/lesson-02.org
index 2ffedde..0a640df 100644
--- a/_subsections/sec04/lesson-02.org
+++ b/_subsections/sec04/lesson-02.org
@@ -6,3 +6,20 @@
 - [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45069799#overview][S04:L45.02 - Project Assets & Imports]]
 
 * Notes
+
+** project.godot
+- best not to edit
+- this file has to be there for godot to recognize the folder as a godot project
+
+** import files
+- for every file imported, there will be a file with a similae name only the extension .import
+- these import files contain metadata used by godot
+
+*** resources
+- are data containers
+- have unique ids
+
+*** why does this matter
+- if an import isn't working, you can open the import file and see if something needs fixing
+
+** game.tscn
diff --git a/_subsections/sec04/lesson-03.org b/_subsections/sec04/lesson-03.org
new file mode 100644
index 0000000..e5c3e25
--- /dev/null
+++ b/_subsections/sec04/lesson-03.org
@@ -0,0 +1,8 @@
+#+title: Section 04 - Lesson 03 | Physics 2D Nodes
+#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../../_share/media/css/godot.css" />
+
+* Links
+- [[../../toc.org][TOC - Godot Notes]]
+- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45069801#overview][S04:L45.03 - video]]
+
+* Notes
diff --git a/toc.org b/toc.org
index 04b4e02..c87a1ce 100644
--- a/toc.org
+++ b/toc.org
@@ -27,3 +27,4 @@
 ** Section 4 - Tappy Plane!
 - [[./_subsections/sec04/lesson-01.org][Lesson 01 | Project Setup & Aspect Ratios]]
 - [[./_subsections/sec04/lesson-02.org][Lesson 02 | Project Assets & Imports]]
+- [[./_subsections/sec04/lesson-03.org][Lesson 03 | Physics 2D Nodes]]