Faulty CODING & CIRCUIT BUILDING TOY - Can I Fix it?

Hi, in this tea break repair I look at an interesting toy called Power Tracks by John Adams and was sent in by a viewer named Tom. It is a coding and circuit building game, and unfortunately this one has stopped working. 'Volty' only travels in a straight line and doesn't follow the circuit. Can it be fixed? Let's find out. Remember that this is just for entertainment and I am not an expert in these repairs. The processes in the video may not be the best way, the correct way or the safest way to fix these things. I do love fault finding and trying to fix broken things, so I hope that comes across in this 'Trying to FIX' series. Many thanks, Vince.