Sand pits
 

Does anyone know where I can get a small sand box suitable for drawing patterns? Like zen monks do?

There are loads of different sand boxes on Amazon, most of them include stuff to make a zen garden. They look quite expensive though. You could have a look through to see if any of them suit you. There was a very small box with just sand I saw but it might be too small.

The sand seems different so i don’t think you could buy a bag of normal sand and a tray to put it in. Although it depends if you’re wanting proper Zen stuff or not.

It would be nice to have some little models, maybe a bridge or pond or a flower. Nice and relaxing.

There's loads like that on Amazon.

Maybe try Etsy as well for those Japanese zen garden kits with the sand and rake. I remember seeing some good ones on there. Probably a bit more expensive than Amazon though.