Kanzi, a bonobo ape born in 1980, can use over 200 keyboard symbols. He can also make up simple sentences - similar to a child of two. This is a considerable feat, but is still not human language. Sue Savage-Rumbaugh, who developed the keyboard and taught Kanzi, thinks he learnt language by watching and imitating as researchers tried to teach his mother, Matata. Kanzi, who was always present at the sessions, may have learnt the symbols at the same time.