Come away with me, Mabel, in my merry picnic table

It seems that whenever I have a post of this sort (like the balcony spatula), I try to frame it in terms of "Let us suppose that you are x and you want to do y."

I am stymied.

It's a picnic table tricked out using riding motorcycle and lawnmower bits. The fellow on the right front (blue shirt and sunglasses) seems to be driving with a steering wheel under the table, and everyone else seems to be displaying a surprising lack of enthusiasm.

"Mr Macdonald [the inventor] said if there was any public interest, he might patent the invention and turn out a few more."