What's Solar Cookin' Good Lookin'?

I took my daughter to the Solar Road Show this past weekend (June 9). There were so many things to do this weekend, it was really difficult to decide and we in fact had a much busier day planned. Then came the rain washing away all other possibilities. We were going to go to the Electric Vehicle meet in Spanish banks, but seeing as there are no buses that run that way (ahem, what's the deal with that?) and I don't drive and we weren't about to cycle in the pouring wet onslaught, we chose a safe and dry trip to Granville Island for some fun, imaginary sun, activities.
The Solar Oven Road Show was held in the Kids Only Market and, as you can imagine, was extremely loud (recommendation: make sure you have had lots of rest before going to this place!).
It was difficult to hear the presenters though they made themselves available to help everyone make a unique, functional (? - haven't exactly tried it yet) solar oven. Materials provided were an assortment of shiny aluminum paper squares, staplers, strings, springs and straws. They demonstrated what worked and what didn't using a bright flashlight and fake chocolate. We opted for something we could both set up and fold up again easily. I guess you could say it worked but my daughter and I have yet to work out the kinks before we market our design.