1: Start by combining the glue and baking soda in your chosen container. You will notice that as you stir the baking soda into the glue it thickens! This is really the point of adding baking soda to saline solution slime recipes.
Tip: Experiment with different amounts of baking soda!
2: For our bubbling Halloween slime we used green food colouring. Orange and purple would be fun too!
3: In another small container, mix the vinegar and the saline solution.
Tip: You can also play around with the amount of vinegar you use for another way to set up a slime experiment!
4: Pour vinegar/saline mixture into the glue mixture and start stirring!
You will notice the mixture begin to bubble and eventually erupt everywhere! This is the reason for the tray!
5: Continue to stir until the eruption is complete. You will notice that it gets harder and harder to stir because you are mixing your slime as well!
Once you have stirred as much as possible, reach in and pull out your slime! It will be a bit messy at first but this slime is wonderful! All you need to do is knead it a bit.
Tip: add a few drops of saline to your hands before you reach in for the slime!
It should not be sticky on the hands either! But if after kneading your slime it still feels sticky, you can add a drop or two of saline to it and continue to knead. Don’t add too much or you will end up with a rubbery slime!
Go ahead and play with your bubbling slime!
Encourages PSED, A&E, PD, UW