Human: What materials are needed to build a fort out of pillows? Assistant: 
To build a fort out of pillows, you will need a variety of pillows, preferably in different shapes and sizes, as well as blankets, sheets, and cushions to help hold the pillows in place. Tape can also be used to secure the pillows if needed. Additionally, you might also want to add some string lights or other decorations to make the fort even more fun and cozy!