If you’ve wondered how to explain buoyancy and density science for kids, you’ll want to read on; this week we had great fun trying our own Camelot-inspired variation of this simple experiment that I found at Wonderville.
In D,8’s continuing King Arthur obsession, our version was a look at how the sword Excalibur might have floated up out of the lake to King Arthur. D had expressed some skepticism about the Lady of the Lake’s existence (but of course dragons, magicians and evil sorcerers make perfect sense – I love how kids think!) so we used the buoyancy and density science experiment to look at how the sword might actually have floated up to the king.
-two balls of clay or play dough, the same size and weight.
-a large bowl of water.
-(optional) your King Arthur costume. This last one turns up a lot around here.
Take one of your balls of clay and lower it into your bowl.
Watch it sink to the bottom.
Once the clay sword became too soggy to use, we made a tiny toothpick sword and a smaller bowl of water and continued enjoying the ‘magic’ of the sword floating out of the water – when it breaks the surface it really is pretty thrilling!
A few other buoyancy experiments that you might want to try out:
Salt Water Density Science Experiment For Kids from Little Bins For Little Hands
Preschool Science: How Long Will A Lego Boat Float? From JDaniel4’s Mom
And, of course, you’ll want to read this week’s explorations for kids from my cohosts here at STEM Saturday!
Building Igloos with Marshmallows from Lemon Lime Adventures
Coding with LEGO from Little Bins for Little Hands
Polar Bear Science STEM Experiment from Preschool Powol Packets
Hands-on Sorting Vertebrates & Invertebrates from Stir the Wonder
10 Winter STEAM Challenges for Kids from Handmade Kids Art
10 Ice Science and Engineering Activities from The Science Kiddo
What explorations have you been up to this week?