Here is a goal: How do I attach two or more pieces of foam together.

How would you accomplish this goal?

I. Apply any type of glue to both surfaces you wish to bond together. Afterwards, press both glued surfaces together and apply pressure. Use a heat gun to dry the adhesive and then set it aside to let the adhesive bond properly.. II. Apply tacky glue to both surfaces of the foam pieces evenly, and wait a couple minutes for the glue to settle. Then press both foam pieces together, apply pressure to improve the bonding process. Let it dry and set for at least 30 minutes..
II.