diff --git a/good_ideas.myco b/good_ideas.myco
index 1c5038a..211da94 100644
--- a/good_ideas.myco
+++ b/good_ideas.myco
@@ -59,4 +59,5 @@ https://worksinprogress.co/issue/the-beauty-of-concrete/
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 }
 * AutoGaryMarcus.
-* Automate those one-way/recorded video interviews using an LLM, TTS and deepfake system.
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+* Automate those one-way/recorded video interviews using an LLM, TTS and deepfake system.
+* Hex-grid particle simulator (similar to the Powder Toy) with GPU acceleration or HashLife algorithm.
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