Solar Oven S’mores {Summer Science Camp}

Welcome to week 2 of DIY summer science camp. Just like last week there is a slight element of failure, but that’s all part of the process, right? That’s what I tell myself anyway.

Whenever we go on vacation and have access to some sort of yard, we make s’mores. I know you can make them in a regular oven and all that, but, really? That just doesn’t seem right to me. Last year we made s’mores over the campfire, but as we visited during fire season this year we were forced to explore alternative methods. What could be less likely to start a wildfire than a solar oven? We decided to try making solar oven s’mores and during the process discovered a second way to make s’mores, too!

Solar oven s'mores. Fun twist on classic science experiment.

My dad had the brilliant idea of using an empty tool box as the oven. We covered a baking tray with foil and set it inside the box. In the lid we placed a sheet of cardboard, also covered with foil. We propped the tool box oven on the porch railing, but if you need to, you can use a stick or ruler to keep the top open at the correct angle so the sun bounces off the foil towards the s’mores.

To help the marshmallows get gooey faster, we tore them up into little bits. I also broke up the chocolate into small pieces.

It wasn’t a very hot day, but the sun was quite strong. Our solar oven s’mores got off to a slow start. The chocolate did get soft right away (as chocolate does), but the marshmallows were a harder sell. They definitely got softer, but were a far cry from gooey. I speculated to the boys that they simply had too many chemicals and preservatives in them to melt. “Moooooooom!” they replied. Although I do believe they secretly agreed with me.

Make solar s'mores. Summer science activity with kids

Then we had the brilliant idea of getting out the magnifying glass to concentrate the solar power on the s’mores!

It actually worked well and we quickly had our solar oven s’mores smoking! Never mind that they now looked like they had the pox, what will all the little black spots the sun burned into them.

The magnifying glass worked splendidly on the chocolate, too, quickly melting it into an ooey-gooey mess. It even burned tiny spots into the crackers.

How to make solar s'mores. Two ways.

So, even though the solar oven didn’t work perfectly, it was successful enough that the boys got some hands on experience with the power of the sun.  Plus, what better way to celebrate science learning that finishing off with a tasty treat?

Join What Do We Do All Day? and Coffee Cups and Crayons for all 8 weeks of simple learning ideas with Summer Science Camp!

Week 1: How Failure Teaches Kids to Think like Scientists and Mento Geyser

Week 2: Solar Oven S’mores and Dancing Raisings

Follow the science Pinterest board for more ideas:
Follow Erica • What Do We Do All Day?’s board Science Activities for Kids on Pinterest.

Simple summer science projects for kids

In case you want to go all out and construct a solar oven from a pizza box, check out this video how to:

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  1. says

    Erica, this reminded me of when I was a kid and my mom packed ham, tomato and american cheese on a roll in aluminum foil for the beach and let them sit in the sun. The cheese would melt and the whole sandwich would be warm. OH, how yummy!

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