Last year, when we played with Baking Soda Letters in the Water Table, I found out that baking soda can be dried and reused even after it has already reacted with vinegar.
After our Fizzy St. Patrick’s Day Science activity a few weeks ago, we once again had a lot of wet baking soda left over, and E and I decided to turn them into Fizzy Treasure Rocks: We took large handfuls of wet baking soda, placed a gold coin in the middle, and formed the baking soda around it.
Are you in need of awesome science activities for St. Patrick’s Day? You’re in luck! Check out this list of St. Patrick’s Science Experiments and try them with your kids.
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Recommended St. Patrick’s Day Activity Kits
If you want a hands-on activity for St. Patrick’s day, you have to get this sensory bin from Etsy. I am sure your kids will enjoy playing while they develop some important skills.
If you love baking and you have kids, grab this St. Patrick’s Day cookie decoration kit. You will have a wonderful time together while celebrating the holiday!
Materials for Fizzy Treasure Rocks
- Wet baking soda. (If you don’t happen to have any leftovers from another activity, you can just add a little water to unused baking soda. Or simply do another activity first 😉 )
- Gold coins or other small treasures to hide in the baking soda.
- Fizzy tub colors, liquid watercolors, or food coloring.
- Squeeze bottles.
- Water table (optional but great for minimizing messes and for sibling play).
Recommended Fizzy Experiment Kits
If your kids love this fizzy treasure rock activity, they will surely love this pirate’s potion kit. Let them have fun and explore making their own potions!
Your kids will love bath time with these bath bombs. They can color it the way they want and bring them during bath time for a fizzy and fun bath!
Don’t forget to check out other Fizzy Experiments Your Kids Will Love.
Recommended Treasure Digging Kits
Other than these Fizzy Treasure Rocks, your kids will love these other treasure-digging kits!
Thames & Kosmos I Dig It! Treasure – Pirate Treasure Excavation KitNATIONAL GEOGRAPHIC Mega Fossil and Gemstone Dig KitsJumbo Pirate Dig Kit – Pirate Toys for KidsXXTOYS Pirate Treasures Dig Kit Break Into 5 Bricks Treasure Excavation KitsConstellation Mega Fossil Gemstone Dig KitNUOBESTY 1 Set Gem Excavation Kits Gems Digging Kit for Kids Mineralogy Geology Science Gift
We let the fizzy treasure rocks dry for several days. Try to avoid handling them as much as possible, as they can be quite fragile once they’re dry.
When we’d decided that they were dry enough, I gently placed the baking soda rocks in the water table. I also scattered some extra dried-out baking soda that we hadn’t turned into treasure rocks all over the water table.
E wanted to color the vinegar green again and put yellow and blue fizzy tub color tabs in one squeeze bottle and one pitcher full of vinegar.
Then she got to work while N watched.
She didn’t spend that much time on the treasure rocks, though.
Instead, she decided to grab a small cup, fill it with crumpled-up baking soda and add a tiny bit of vinegar. She’d wait until the fizzing stopped, add more baking soda, then add another tiny bit of vinegar. It was quite fun to watch, and she was extremely patient.
Only after she’d done that for a really long time did she decide to make the cup overflow 🙂
Meanwhile, N went for mass fizzing action when he poured out the larger container all at once.
He chose the sensory approach to this activity and spent some time putting his hands in the foam over and over and splashing around.
When E was done with the squeeze bottle, he imitated her approach – he didn’t mind that the bottle was empty at this point 😉
To finish off the activity, E asked for some more vinegar to work on the treasure rocks some more.
For some reason, neither child was interested in the actual treasures this time, but that’s completely okay. I set up the activities (sometimes with help), and they decide how to use them 🙂
- Wet Baking Soda
- Small Treasure / Gold Coins
- Fizzy Tub Colors / Food Coloring / Water Color
- Squeezy Bottles
- Water Table (Optional)
1. To create treasure rocks, simply take large handfuls of wet baking soda from another activity. If you don't have any leftovers, just add a little water to unused baking soda or simply do another activity first.
2. Place a gold coin or treasure in the middle and form the baking soda around it. Repeat until you have several treasure rocks for the activity.
3. Let the fizzy treasure rocks dry for several days. Try to avoid handling them as much as possible, as they can be quite fragile once they're dry.
4. Once dried, scatter the treasure rocks in the water table. You can also put some extra dried-out baking soda that you hadn't turned into treasure rocks.
5. For St. Patrick's Day theme, you can color your vinegar green and yellow.
6. Now it's time to let the kids play and decide how to dig up those treasures!
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This is an activity that will not only enhance the kids’ motor skills but they will have fun playing and watching the fizzy rocks! They can play with it however they want and you can put whatever treasures you think they will enjoy looking for.
Try out this fun activity now!
More St. Patrick’s Day Activities
Looking for spring-themed picture books? Check out this list and enjoy reading cute stories about spring!
Free St Patrick’s Day Dot Markers Printables by 3 Dinosaurs
The Luckiest St. Patrick’s Day Ever Activities by Homeschool Preschool
Easy Science Experiments for St. Patrick’s Day by STEAMsational
More Fizzy Science Activities
Baking Soda Letters in the Water Table by Simple Fun for Kids
Baking Soda and Vinegar Activities by Simple Fun for Kids