I visited my youngest sister a few weeks ago. Her son showed me a cactus he had that was very small and blooming profusely. I told him I’d like a piece of it, thinking he could get it for me sometime when he repotted it. Instead, he dug out a little chunk and stuck it in a peat pot he had handy.

It has survived its transplanting and has even grown its first flower. I am delighted.

Edit to add:

I took those pictures too soon. It wasn’t fully open.