jhirst613

Can anyone please offer any further advice in how to make resolve the problem. My 6year old son has assembled his 4x4 crawler and the wheels drive in opposite directions also. I note the comments on the differentials but do not understand how to resolve the problem. I would really appreciate any help anyone can provide to describe or show how to resolve this problem as he is upset not to be able to play with his Xmas toy and I dont understand how to help him at this stage?