This was a tiny replica of the adult - in fact it was created by a process called budding and is a clone of the original anemone.
While I collected the other rock pool animals from the beach for the drop in session, I have had the sea anemones for sometime in an aquarium at home. (see blog post below).
Anemones are often attached to a large rock or similar - so I have kept this one at home as it is attached to a pebble - so I always have one to take to schools etc. Sea anemones are also easy to keep in a cold water marine aquarium.