The first step to building your very own swing set is to get all the materials which are required to build the swing.
Before you get the material, you need to figure out if you are looking to build a wooden swing set, or one that is made out of metal (part metal and part wood).
Once you have figured this out, go to the local hardware store and buy all the building material. In order to get a reasonable amount of supplies, tell the representative in the store just what it is that you are looking to build, so that they may give you a decent amount of supplies to get to work with.
Create blue prints/download
Now once you have the supplies, you need to start figuring out just what structure your swing set should be. You will also have to balance out the weight ratio, so that most people can use the swing. Now this might end up taking up a lot of time, which is why a smarter thing to do, would be to download plan off the internet.
Once you have these plans downloaded, you can go ahead and modify them a bit, so that the swing is designed more to your preference.
After you have the design, go ahead and create the swing set with the supplies you bought earlier. Once you have finished it, go ahead and put it through a weight test. After this, you may paint it, or decorate it even further, so that it appeals to your child even more than before.