Knurr is your soft octopus friend with sound. He has a treasure room in his mouth where you can hide your favorite things or secrets. Knurr will be faithful and not let your annoying little sister inside. If you know the secret code, he will give you a happy sound. If you are not aware of the code and try to access the room, he will growl and let you know you are not welcome. Knurr is  a working prototype and has a battery, Arduino board and sensors inside his body.