diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 42948b8..bb9dfac 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -208,10 +208,10 @@
             "state": {
               "type": "file-properties",
               "state": {
-                "file": "Temporary/Madgwick Filter.md"
+                "file": "2 Personal/Lists/Business Ideas.md"
               },
               "icon": "lucide-info",
-              "title": "File properties for Madgwick Filter"
+              "title": "File properties for Business Ideas"
             }
           },
           {
@@ -254,12 +254,12 @@
             "state": {
               "type": "outgoing-link",
               "state": {
-                "file": "Temporary/Madgwick Filter.md",
+                "file": "2 Personal/Lists/Business Ideas.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               },
               "icon": "links-going-out",
-              "title": "Outgoing links from Madgwick Filter"
+              "title": "Outgoing links from Business Ideas"
             }
           },
           {
@@ -268,13 +268,13 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "Temporary/Madgwick Filter.md",
+                "file": "2 Personal/Lists/Business Ideas.md",
                 "followCursor": false,
                 "showSearch": false,
                 "searchQuery": ""
               },
               "icon": "lucide-list",
-              "title": "Outline of Madgwick Filter"
+              "title": "Outline of Business Ideas"
             }
           },
           {
@@ -403,9 +403,23 @@
                   "icon": "lucide-file",
                   "title": "Backup Strategy"
                 }
+              },
+              {
+                "id": "8225090775892c9b",
+                "type": "leaf",
+                "state": {
+                  "type": "markdown",
+                  "state": {
+                    "file": "2 Personal/Lists/Business Ideas.md",
+                    "mode": "source",
+                    "source": false
+                  },
+                  "icon": "lucide-file",
+                  "title": "Business Ideas"
+                }
               }
             ],
-            "currentTab": 1
+            "currentTab": 2
           }
         ],
         "direction": "vertical",
@@ -418,12 +432,13 @@
       }
     ]
   },
-  "active": "0cf055544c809708",
+  "active": "8225090775892c9b",
   "lastOpenFiles": [
+    "2 Personal/Home Lab/NAS/Backup Strategy.md",
+    "Temporary/Madgwick Filter.md",
     "0 Journal/0 Daily/2026-01-10.md",
     "Temporary/Material Damping.md",
     "Temporary/Friction Damping.md",
-    "2 Personal/Home Lab/NAS/Backup Strategy.md",
     "Attachments/Pasted image 20260121121234.png",
     "2 Personal/Home Lab/Homelab.md",
     "2 Personal/Home Lab/Baerhalten/Home Assistant.md",
@@ -448,7 +463,6 @@
     "2 Personal/Lists/Packlisten/Packliste - Skitour.md",
     "0 Journal/0 Daily/2026-01-03.md",
     "0 Journal/0 Daily/2026-01-02.md",
-    "Temporary/Untitled 1.md",
     "Attachments/Pasted image 20251202214228.png",
     "2 Personal/1 Skills/AI",
     "2 Personal/Home Lab/Baerhalten",
diff --git a/2 Personal/Lists/Business Ideas.md b/2 Personal/Lists/Business Ideas.md
index 549d60c..19e1ded 100644
--- a/2 Personal/Lists/Business Ideas.md	
+++ b/2 Personal/Lists/Business Ideas.md	
@@ -56,6 +56,7 @@ Diese Liste kann auch mit `#idea/startup` oder mit `#business-idea` ergänzt wer
 - Nano banana um leuten andere frisuren zu geben um zu entsxheiden was man will
 - AI-based research books: write a research article / research book which interactively adds more research content with well established resources to become an expert in a topic (e.g. drone regulations in switzerland)
 - 3d model library.
+- app for organizing pubquizzes (similar to [Mutant Teapot - Puzzle Games for Curious Minds](https://mutantteapot.com/))
 
 ## Medtech 
 - use differential cameras to visualize airflow to teach deaf people how the airflow is when speaking to learn it properly