I don't know where you are, but actually in US, some psychologists have carried out experiments in training chimpanzees to learn languages through paintings and icons. Those champanzees actually did learned some phrases and sentences through the experiments and were able to communicate with psychologists to some extent. 'So, when it is good for chimpanzees, will it be good for kids?' There has been some discussions and debates on this issue. My personal opinion is that it would work if these icons and pictures make sense.