Old car tires, today it is probably one of the most affordable building materials. They are in any garage where they are stored in the far corner “just in case”. And rightly so, do not rush to throw them away.
After all, from the tires, if you include the imagination, you can invent so much of everything and everyone. For example, furnish a playground. The presented photograph shows only a small part of the realized fantasies, and how many more fun things can be invented to please the children.
Funny animals, swings, sandboxes - lots of options.