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Hi @mitch18, you are right, they are not safe for kids, but there are cacti with very small spines, practically harmless, the one I remember best is the species Opuntia cochenillifera. This cactus is not columnar, rather it is arborescent and produces very beautiful flowers. I show you some photos of a cactus that I had at home.

They can be found in the Philippines. I show you a map of places where they have been found.