Add all ingredients to a medium size bowl and mix well.
Once mixed, remove from bowl and knead with your hands until it is no longer sticky. This may take a few minutes.
If slime is still too sticky, add more starch (about 1-2 tbsp) to a bowl, drag the slime through it, and knead again. Repeat if needed. Add additional shaving cream, if needed, once slime is the desired consistency.
Store in an air tight container until too dry to play with (about 2-3 weeks)