Q&A for How to Make a Box Fort

You can put in blankets, pillows, books, and other things to do, like board/card games, as well as snacks/drinks.

Check with local shops that have deliveries and ask them for the boxes.

Large boxes can be obtained from furniture stores, box stores (no pun intended!), places that sell large appliances, supermarkets, etc. You may need to ask for the store manager to keep some boxes aside for you though as most large stores have efficient box crushing machines to get rid of excess boxes rather than giving them away.

Six boxes ought to do it.