Grandfather never goes out in his fox-form during the day, but here he is, scratching at your window. "I need your help," he explains, "but you may think it's silly. I need you to find a gift my grandmother gave me long ago. A toy car."

You and Pippa can never resist a good mystery, and this one proves to be quite difficult. How does a toy vanish from inside a box and into thin air? That's what appears to have happened, but with you and Pippa on the case, perhaps it won't stay vanished for long. See if you can find it before Pippa does.