Question: how to make fluffy slime with boric acid?
Answer: In bowl 1, add 1 cup of hot (not boiling) water.
Add 1 heaped teaspoon of boric acid into bowl 1 and mix until dissolved.
In bowl 2, add 1/2 cup of PVA glue and 1/2 cup of water. ... 
Add food colouring, glitter or anything else you want to bowl 2 until you're happy.
Now get ready to stir. ... 
Keep stirring.