Plastic paving stones and climbing holds idea

Hi!
Congrats for the great work and really nice webpage and videos!

I saw this video on youtube where they made plastic paving stones by mixing plastic with sand.
That gave me the idea to make climbing holds the same way. Only plastic would make them to slippery for climbing and mixing sand could give a nice grip.
Just an idea for a product that is easy to make and can sell for a good price, i think.
Cheers

https://goo.gl/images/sNuyQB

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Brilliant idea. There could definitely be a market for this. go go go 🙂