When Kullervo first got his tattoo done (of Odin and Sleipnir, his eight legged horse),
Oliver would tell us every day about his tattoos. He would pretend he had one on his nose, on his arms, all over his body. Usually he said that his tattoos were of some of his favorite TV characters (specifically, The Backyardigans). Once the newness of the tattoo had faded, though, he stopped talking about it.
These were also tattoos. One was “Ooks and his horse Sheeks”. The other remained nameless.
However, he did make me scrub them off before bed. So I think that he maybe isn’t ready for a real tattoo just yet.