What do I put in this?

[AMKuska]

I am posting this on behalf of my mother-in-law. She asked me to ask you guys if you had any ideas for what could go in here:

It gets 6-8 hours of full sun in the morning.

 

[Dirtmechanic]

Morning sun is glorious! It will drain well due to some height, not be overly hot etc. I would love to try a rose setting but actually one of my favorites in a round setting we have was a huge paddle cactus. It took some years to get big though.