diff --git a/notes.txt b/notes.txt
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+++ b/notes.txt
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+https://hackaday.com/2016/06/14/hackaday-prize-entry-micro-robots-for-education/
+
+https://www.adafruit.com/product/3216
+
+https://www.exp-tech.de/plattformen/robotik/roboterfahrzeuge/7673/adafruit-mini-round-robot-chassis-kit-2wd-with-dc-motors?gclid=EAIaIQobChMIrpHIq4Ke4QIVSeAYCh0LTgdWEAQYCCABEgIQcfD_BwE
+
+https://www.exp-tech.de/plattformen/robotik/roboterfahrzeuge/7898/adafruit-mini-3-layer-round-robot-chassis-kit-2wd-with-dc-motors?gclid=EAIaIQobChMIrpHIq4Ke4QIVSeAYCh0LTgdWEAQYCyABEgI76vD_BwE
+
+