This is my favourite fort to build kids cane even sleep in it.
Step 1: Roof
Attach a sheet to four post on the corners of the bed .(if you bed doesn't have post just attach some 4/4.) use elastics to secure in place .
Step 2: Pillow Pile
Make a tall pile of pillows in the middle, after you put the sheet on to make 2 sides and to stop it from sagging.
Step 3: Door
Put a sheet up with more elastics to make a door.( you do not need one
Step 4: Personalize
Bring on the Teddy's and blankets to make this fort you own. ( generally this fort is for kids )
Step 5: Play
Let you kids mind you wild while they make up crazy things they do in the fort .