Description
Create fizzy treasure rocks that hide surprises inside. Kids spray vinegar on these baking soda formations and watch them bubble and dissolve to reveal hidden treasures.
Ingredients
2 cups baking soda
1/4 cup water (add more if needed)
Small treasures (plastic dinosaurs, beads, coins, toy gems)
White vinegar for fizzing
Food coloring (optional)
Instructions
1. Mix baking soda and water in a large bowl until you get a damp sand texture that holds together when squeezed.
2. Scoop a handful of mixture and press a treasure into the center, then pack more mixture around it to form a rock shape.
3. Place shaped rocks on a baking sheet and let them air dry for 4 hours or overnight until firm and solid.
4. Set up your excavation area with rocks in a shallow tray, fill spray bottle with white vinegar, and have towels ready.
5. Spray vinegar onto the rocks and watch them fizz, bubble, and break apart to reveal the hidden treasures inside.
Notes
Store dried rocks in airtight containers for up to 2 weeks away from moisture.
Reused baking soda from previous experiments works perfectly once dried.
Add food coloring to create different colored rock layers.
Freeze rocks for 30 minutes before excavating for extra durability.
This activity works best in well-ventilated areas or outdoors.
Supervise young children with small treasures due to choking hazards.
- Prep Time: 15 minutes
- Cook Time: 2 hours
- Category: Kids Activities
- Method: Mixing
- Cuisine: Activity