Here's the deal: As part of a uni project, I had to plan

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Here's the deal:
As part of a uni project, I had to plan and partially implement the software for a small autonomous loudspeaker unit. For my report, I need a sketch of such a unit. It will be someone else's job to design the thing in the future, but right now the profs want at least something to look at and I fear my scribbles will make them want to an hero.
So if anyone would kindly provide me with a sketch, that would be grand. The pic should give you a rough idea what the overall shape would be like, except the units are supposed to be mobile. Here are some pointers:
>roughly 1 m in height, around 30 cm diameter; shouldn't tip over
>loudspeaker protected from rain
>driven by relatively small wheels, maybe 10 cm diameter?
>no display, no external ports; maybe use the loudspeaker cover (kind of a mushroom shape in my mind) to also house the microcontroller?
Black and white pencil sketch or whatever, I don't care. Something to put in my presentation.

Thanks in advance. Going to look around the board and see if I can help others.