Reflective Parabolic Cardboard Solar S’mores Cooker Oven
An engaging, screen-free learning activity that builds real-world creativity and critical thinking for kids aged 7 to 13.
Materials Needed
- • Clean pizza box or cardboard shoebox (1 box)
- • Heavy aluminum foil (1 roll)
- • Clear plastic food wrap (1 roll)
- • Black construction paper (1 sheet)
- • Graham crackers, marshmallows, and chocolate bar (1 snack pack)
- • Wooden skewer (prop stick) (1 stick)
Pro Tips
- → Cut a three-sided flap in the box lid and cover the inside with smooth aluminum foil to reflect direct sunlight.
- → Line the bottom inside of the box with black construction paper (to absorb heat) and seal the opening with clear plastic wrap to trap hot air.
- → On a sunny day, internal temperatures reach 65–80°C (150–175°F), melting chocolate and marshmallows into delicious solar s’mores.
Safety First
Do not stare into the reflected foil glare; the cooking surface can become surprisingly hot in full sun.
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Step-by-Step Instructions
Step 1
Cut a flap in the lid of a pizza box, leaving one edge attached, and line the inner flap with shiny aluminum foil.
Step 2
Line the inner floor of the box with black paper and seal the lid opening tightly with clear plastic wrap.
Step 3
Assemble graham crackers with chocolate and mini marshmallows inside the box beneath the plastic window.
Step 4
Prop the foil reflector flap open with a wooden skewer facing the bright sun, baking for 10–15 minutes until melted.