There is beautiful collection of different type of cactus. Few years ago one of our friend gifted us teeny-tiny cactus as a little ball. We did not think that it would live long with us but nowadays instead of one ball, it is now a cactus with two more balls on it's side. It is on our window sill where we have a lot of sun shine. Once you water it plenty water, there coming little purple flowers on each of it. Looks really funny but beautiful.
The poem passes very well to cactus family too :)