Ocean Water Experiment for Kids

Explore ocean science in an engaging and hands-on way with this Ocean Water Experiment for Kids. This saltwater buoyancy STEAM is perfect for your next ocean preschool theme.

collage of ocean water experiment images with text: Ocean Water Sink or Float for PreschoolersLittle kids get all kinds of excited to learn about science and especially with fun buoyancy experiments like this Ocean Water Experiment for Kids. Teach your preschoolers and kindergartners how saltwater affects buoyancy with this adorable preschool ocean STEAM. 

child picking up stick for ocean sink or float activity
We kicked off our ocean thematic study with an entire week about the Seascape and today’s lesson was all about Ocean Water. If you missed it, we shared our Ocean Salt Painting for Kids from today’s lesson too! 

child putting small object in bowl for sink or float experiment
child experimenting with whether or not small objects sink or float
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A huge thanks to Experience Early Learning (formerly Mother Goose Time) for providing us with their Experience Preschool curriculum for free in exchange for sharing our honest and authentic stories resulting from our personal experiences. It’s been such a huge blessing to us! As always, my opinions on awesome stuff for little kids are 100% my own.

small objects in bowls of fresh water and salt water for ocean experiment
Today’s saltwater vs freshwater buoyancy experiment is the perfect way to explore this concept with your inquisitive little learners in a hands-on and of course age-appropriate way! 

wooden spool and other small items in bowl of water
How Does Saltwater Affect Buoyancy

I can’t even begin to tell you how much baby girl enjoyed this preschool salt water experiment. She seriously had a blast putting each of the items into one bowl or the other to see which would sink and which would float. 

child placing hand into small bowl of water
Ocean water covers most of the Earth. There are five oceans: the Pacific, Atlantic, Indian, Arctic and Southern Ocean. The ocean consists of salt water, which can help objects float better than fresh water.  

small bowls of water containing objects for sink or float experiment
What I love so much about the ocean experiments in our Teacher Guide is that they’re able to be easily adapted for kids of all ages. 

button on foam block in small bowl of water
The little guy totally understands that salt helps objects float better while baby girl is just all about the sensory experience. Either way, it’s a win-win. because both kiddos are getting a valuable educational experience while learning and exploring together. 

child picking up object from small bowl of water
Ocean Water Experiment for Kids

What you’ll need

  • 2 Clear Bowls of Water
  • Salt
  • Variety of Items

Here’s how to do it

  • Invite the child to explore how the items sink, float, and move in the water.
  • Encourage him or her to pour salt into one of the bowls.
  • Observe how it changes the way the items react to the water. 

child experimenting with sink or float activity using small bowls of water
This ocean water STEAM activity is so quick and easy and your little learners are sure to love it, so definitely add it to your next preschool ocean theme. 

child reaching into dish filled with water and small objects
Speaking of putting together a preschool ocean theme, check out these awesome ocean crafts and activities from The Keeper of the Memories: 

bowl filled with small objects for ocean water sink or float activity
Don’t forget to check back if you’re interested in seeing what we’re up to next week with our ocean theme from Experience Early Learning (formerly Mother Goose Time)

Looking for more insight & inspiration? Here are the top 10 most popular posts from The Keeper of the Memories. You’re definitely not going to want to miss these!

Experience Early Learning Early Childhood Education Verified Blogger badge with owlAs an Experience Early Learning Blog Ambassador, I receive the Experience Early Learning Preschool curriculum in exchange for my honest and authentic stories resulting from our personal experiences. As always, my opinions on awesome stuff for little kids are 100% my own. Keep in mind that all preschoolers do things in their own time and on their own terms. What one is ready for, another might not be. Please use your best mama judgement when planning activities for your little kids. #preschool #homeschool #mgtblogger

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collage of ocean water experiment images with text: Ocean Water Sink or Float for Little Kids