The reason for this instructable is one which happens to us all - A little bit of age.
We have a trailer which we use for camping, but having no way to get it into the garden for storage is kept in the front between the Bay Window and the front wall (see the initial pictures). When we want to use it I have to lift it through the gate by resting it on my knees and shuffling sideways very carefully.
I decided we needed a trolley to ease access and my daughter wanted to help, so this gave a great chance to show her how to use a few hand tools.
At the start I have to say that this is the first time she has used the tools employed in this instructable.
The trolley took half a day to create and Lauren enjoyed every bit of it.