Wooden Swingset We Bought A House With A Wooden Swingset And It Is Not Level. What Would Be A Good Way To Level And Secure It?

We bought a house with a wooden swingset and it is not level. What would be a good way to level and secure it? - wooden swingset

I build a castle Rainbow only for my grandchildren. By the way threw to the ground for water drainage. Then put 8 "of sand (level) for drainage, then 10" zone of integrated circuits for protection. A rainbow is not required to secure b / c that is made from 4x6, 4x4 and 2x4. No. 1 "at all. Very heavy and sturdy.
If you do not want this you can maybe a few short legs to each level add to dig. Or, as I and the height of a layer of sand. Then configure your swing at the top. If you are not sure to buy shares of Home Depot on metal. Tell someone what you think HD do with the game and ask the media to go around the campfire and the screw back on its feet.
Good luck and good times for all.