Remember how vinegar reacts to baking soda? Well, here is a similar one. Baking soda and citric acid (similar to vinegar but in a dry form). So that when it gets wet, poof it fizzes up. I can’t scientifically say whether it is actual deodorizing to a toilet (as toilet bombs), since the baking soda chemically reacts with the citric acid. I don’t know what you are left with after the reaction, but the kids like to use them. It’s fun to see them fizz up in the toilet.
What You Need:
This is for a small batch.
A Silicon Mold or anything to shape it.
- 1/2 cup Baking Soda
- 1/4 cup Citric Acid
- 1/4 cup Corn Starch
- For Bath Bombs use add 1/4 cup bath salts (omit for toilet bombs)
- (few drops) Fragrance Oil or E.O. (I use the fragrant Epsom Salt, so I can skip the fragrance oil)
- 2 tablespoons of oil. (Add more or less if you need a better consistency)
- 1/2 teaspoon of water.
- 5 – 10 drops of Food coloring (not necessary, and if you throw them in the toilet you need to swish it with a toilet brush so it doesn’t make a colored ring).
Mix all dry ingredients together.
Then mix wet ingredients together (except for color). I added color a bit at a time later to get effects.
Slowly add the wet to the dry. It will only start reacting (fizzing) when water is involved. If you’re only adding oil it doesn’t react, so if you need it damper add oil. Whisk it up good. It should be the consistency of moon sand or slightly damp sand.
Clump it together and start packing it into the molds.
The first batch, pictured above, reacted after a couple of hours while in the mold. It was kind of ugly in the end but photographed well.
Eventually, it dried out and stopped reacting. It took about 24 hours to get rock hard.
UPDATE: I tried again and adjusted the ingredients (which I have already altered in the above instructions).
The second batch was much better and didn’t start fizzing in the mold.
Molding into shapes
Originally, I wanted to make them look like they had ridges like cupcakes but it didn’t exactly work with real cupcake papers. You need a stiff silicon mold or similar to get them formed right.
Getting color variations is really simple. By adding one color at a time it gives you the option of blending it all the way or just to speckle it. To layer the colors, pack one colored mixture in a mold and then pack another colored mixture on top of it to make a multi-colored shape.
I think I just really like taking pictures of these. That’s the real reason I made them.