I have decided to make a playground in the backyard of my house. I searched for any DIY for this. Then I found an article
https://junkit.ca/blog/making-a-playground-out-of-upcycled-material/.it says that the playground can be made up of upcycled materials such as old tires, wood, skateboards, marbles, etc. It was a new idea to me. Any other idea?
