Making your own swing is very easy. The best way is to do it with an old pallet. It is also the cheapest way to create it. Find a pallet and make sure it is smooth. Check it for any peeking nails or splinters. Use sandpaper to sand the surface, so it will be pleasant. You can hang it on a tree using secure thick rope or chains. Attach whatever you have chosen on each corner of the pallet. Add some pillows for comfort.