How to Catch an Echo

S1, E26: Oakley is playing with his echo... Everytime Oakley blows a raspberry the echo cheekily blows one back. Rosie and Raggles soon realise that other strange things seem to be happening - the Twooter mysteriously moves, Big Bear wakes up with chalk glasses drawn on his face and Bluebird’s Bozberries seem to have a life of their own. Rosie suspects Will is up to no good - but is Will responsible for all the pranks or does the echo really want to come out and play?...