Step 1: What you need
balloons are 2$ for a bag
Flour you can get a home
funnel is 3$
Step 2: How to make
step 1) Take 1 balloon and put the funnel in it then fill it so you can tie it closed.
step 2) Take other balloon and put it around the balloon with flour in it then tie it shut.
Step 3: How to use
Squeeze it and you will feel the pressure and it will relieve you of stress if you do it enough.