ah-present-have-some-fun

You might see also:
https://www.youtube.com/watch?v=N4kmFcr5F1U - Andersen_LaPetiteMarchande-d'allumettes_05
https://www.youtube.com/watch?v=iOYTNjBIodo - 02 beetle bot V 20160604 222152
https://www.youtube.com/watch?v=4T3uJe4j4vQ - VID_20160108_110533_Lego.3gp
https://www.youtube.com/watch?v=4T3uJe4j4vQ - VID_20160108_110533_Lego.3gp
https://www.youtube.com/watch?v=p3CcDCsIl6I - VID_20160108_105605_Lego.3gp
https://www.youtube.com/watch?v=pqSjG4OfD54 - 01 wheel bot V 20160604 180943
https://www.youtube.com/watch?v=LI6-XYRvyzU - 10 the poblem is solved in the gears of the bot V 20160605 143427