Ok, so I'll repeat. I'm new to ALL of this. here is the kit I built.....
http://www.ebay.co.uk/itm/160880393469?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
I followed all the correct instructions, I use a 9v battery to power the Arduino and 4x1.5v battery pack for the motors.
as far as the current getting to the motors< I don't have a clue??? Sorry.
If any of this is of help and you can advise me, thank you.