Pour 5 oz (almost 3/4 cup) of Elmer's Color Changing Glue into a bowl. If your bottle is already 5 oz you can pour the entire bottle in. If your bottle is larger you can use a little more baking soda and contact solution or measure out 3/4 cup to match the recipe ratios.
Add 1/2 teaspoon of baking soda and mix well.
Add 1/4 cup of water and mix.
Slowly add in your 1.5 tbsp contact lens solution (reminder: your contact lens solution should contain boric acid or your slime will not form). Add it in slowly and mix if possible so that you can adjust and ensure you do not add too much. You may not need the full amount so take this step slowly.
Now mix until your slime forms and begins to harden. Take it out and knead, knead, knead. You may be surprised how much you need to knead to really make the slime form. If it’s not the desirable consistency keep kneading. If you find it to still be too sticky, add a little bit of lotion or baby oil to your hands.
To make your slime change color, expose it to sunlight or rub it with an ice cube depending on what type of color changing glue you have.