Our lorry was hard to make. We had a lot of problems making the lorry work. The lorry moves along slowly with the trailer on it. The battery was not powerful enough so we attached two batteries together. It worked for a while but then the motor got hot. We discovered that there were twelve volts in the two batteries and there was only four volts in the motor. We made a reversing switch. The lorry went forwards and backwards. When we showed our model to other classes they thought it was great. We enjoyed making our model but we hoped it would be better. We have now learnt a lot about electricity.