Mimi draws Robot and Rabbit from Google+

Here's a little drawing done by Mimi (6) whilst waiting for the train on Shrewsbury station. I managed to get a little signal and this was what was on my Google+ stream at the time. Now, when i look back over the post to give credits i can't find the post (deleted?). Would really appreciate any help on tracing the artist... maybe a big ask.
Anyways, cute aren't they?