Here's what you'll need:
1 cup cornstarch, $6.90
1/2 cup liquid castile soap, $8.99
1/2 cup baby oil, $4.82
Soap dye (optional), $14.49
Here's how to do it:
# Mix cornstarch, liquid castile soap, and baby oil.
# If you want it to be colorful, add soap dye.
# Knead together into dough.
# Keep it in a jar to maintain squishiness.