Who doesn't love outer space and the possibility of alien life? Here is another one of our quick, easy, and inexpensive tutorials that will teach you how to make a super cool alien excavation. This excavation will create a sense of wonder and awe as your excavating adventurer transforms into an astronaut on a deep space geological quest. Their mission is to investigate the foreign soil and search for signs of alien life in this space themed excavating adventure! 
  • Sand
  • Plaster of Paris
  • Water
  • Mixing bowl
  • Wooden spoon
  • Measuring cups
  • Excavation tools. Wooden dowels and other blunt instruments work well. Sharp tools are unsafe and not necessary as the excavations are reasonably brittle and excavate easily. 
  • Safety goggles
  • Small brush
  • Aliens - There are many aliens available online and you may be lucky and find one in your child's toy box. There are small aliens, big aliens, aliens that glow and pretty much any variation you can think of within a short internet search. Just make sure whichever type of alien you choose can survive the plaster. You can include one large alien in your excavation or a bunch of little ones. 
  • Container - Any plastic container will do. You will just want to make sure the container will hold whichever alien you choose. 

Pro tip: Sprinkle a little glow powder over the surface of the alien excavation once it has dried. Put the alien excavation in a dark room and have your excavating adventurer investigate the surface of the distant planet with a flashlight or UV light before digging in and discovering the alien. 


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  1. Put one cup of sand in your mixing bowl.
  2. Add one-third cup Plaster of Paris.
  3. Use the wooden spoon to mix the sand and Plaster of Paris.
  4. Add one-third cup of water and mix.
  5. Keep adding small amounts of water until you reach a pancake like batter consistency. 
  6. Add your aliens to your container.
  7. Pour a layer of the mixture into the container to cover the aliens.
  8. Gently tap the sides of the container to remove any air bubbles. This will also allow a little mixture under the aliens.
  9. Set the alien excavation in a safe location to dry undisturbed overnight. I like to put the excavation in front of a fan.


Now the alien excavation is ready to be enjoyed. Find an area that is easy to clean up, distribute the safety goggles and excavation tools, and let the excavating begin. 

I hope you enjoyed this super quick tutorial and enjoy making the alien excavation. These excavations are very easy to make, inexpensive, and a lot of fun!
Pro tip: Use this activity to create some excitement around discussions or lessons regarding outer space, planets, astronomy, and especially UFOs. 
If you love excavating as much as we do, be sure to check out our Excavating Adventures monthly subscription by clicking the link below and get an awesome new excavation delivered each month loaded with rocks, minerals, gemstones, fossils, and more!

Happy Excavating!





Digital Dig
Seashells are the external skeletons of a class of marine animals called mollusks.