In this super quick and easy edible excavation tutorial, we are going to make a Giant Gummy Worm Dissection Dig for your young Excavating Adventurer to dig in and enjoy. This tasty treat is super easy to make and a lot of fun.


Excavating Adventures Pro Tip: Don’t have any giant gummy worm? No problem! You can easily use regular gummy worms or any gummy candy and let your young Excavating Adventurers imagination take over. They will enjoy edible excavation no matter what you hide inside. Giant gummy worms can be a little pricey but they make for a really impressive excavation activity… especially after we make them grow!


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6 Tbsp salted butter

6 cups mini marshmallows – Mini marshmallows melt easier than the larger ones.

1/2 tsp vanilla extract

4 cups Rice Krispy cereal

Giant gummy worm

Optional – black food coloring

13 x 9 x 2-inch pan

Measuring cups and spoons


Cooking spray

Plastic spoons, forks, and knives. These will be the excavation tools.

Large tray or mixing bowl. This needs to be big enough to hold the giant gummy worm and have plenty of extra room for it to grow.



Did you know Excavating Adventures has a free program that gives away hundreds of rocks, minerals, fossils, seashells, and dig kits every year? The program is open to anyone and a lot of fun. Learn about geology, earth science subjects, and more and get rewarded with free scientific goodies!


  1. In large saucepan melt butter over low heat.
  2. Add the mini marshmallows and stir until completely melted. Remove from heat.
  3. Add a drop or two of black food coloring if you want.
  4. Add the Rice Krispies cereal. Stir until well coated.
  5. Coat the 13 x 9 x 2-inch pan with cooking spray.
  6. Place the giant gummy worm in the center of the pan.
  7. Using a buttered spatula or wax paper, evenly press the mixture into the pan being sure to completely cover the giant gummy worm.
  8. Allow to cool.
  9. The Giant Worm Dissection Dig is best if served the same day.
  10. Distribute the “excavation tools” and encourage the Excavating Adventurers to dig in and discover the giant gummy worm.
  11. After the giant gummy worm has been recovered, place the worm in the tray and fill with water, making sure the worm is fully submerged.
  12. Observe the giant gummy worm for several days and enjoy watching it grow!


Excavating Adventures Pro Tip: The Giant Worm Dissection Dig is a great way to demonstrate osmosis. Osmosis will cause some of the water molecules to move from the water in the cup into the giant gummy worm. The gummy worm will fill with water and get even bigger. The gummy worm is made of gelatin. Instead of dissolving in water, the gelatin will act like a sponge, absorb water, and grow in size.

Want to investigate osmosis with super absorbent polymer? Then check out some of our Excavating Adventures Extreme kits. Many of these unique excavation kits have real rocks, fossils, seashells, and more hidden among amazing super absorbent polymers like instant snow, giant SAP spheres, crazy growing crystals and more!