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Photography: Diana Horak (used with permission) |
Then I created suspense buy telling the kids they were for a school project we were going to do someday. Then I waited another month or so before I actually pulled them out of the cabinet. Ok, so maybe that part wasn't intentional, but rather an attack of my procrastination gene.
Here's how I did it (and how it worked in the unschooling framework).
I waited until the kids were getting their afternoon snack and told them I was going to let them have marshmallows today.
I printed out two copies of the table from this site. Then I printed out pictures of the atomic diagrams for the first 18 atoms on the periodic table.
I explained how to determine the number of protons, neutrons, and electrons based on this page.

Yellow: Electron
Peach: Proton
Green: Neutron
Then I told them that they could build as many atoms as they wanted, but they had to build each atom before they could eat the marshmallows it contained.
My youngest daughter (4 years old) built the least number of molecules with a total of three. Well, technically her third was just arranging random marshmallows on toothpicks, but I let it slide.
My son (15 years old) built the second least with 8 total. They had to build them in the order I printed them. He got to carbon and, despite his usual high sugar cravings, decided he would rather go play on the Wii U.
My oldest daughter (10 years old) finished a total of 9.

I gave them the parameters and they performed to their level of interest.
You might be asking, What about the other pink marshmallows? I told the kids that for every element they read about I would give them 5 pink marshmallows. All three of the older ones read the introduction about hydrogen here (first 7 paragraphs). The four year old repeated the names of the first 6 elements to me, and I gave her 5 pink marshmallows.