Cool bananas

When Claudia's mother decides to go to Italy, she dumps Claudia with her grandfather - a man she hasn't even met. Claudia expects to meet an old man with a walking cane, but her grandfather wears clashing board shorts and shirt, licks his false teeth in restaurants, sticks incense in his neighbour's toes to keep away bad spirits and his favourite saying is 'cool bananas'! How is Claudia supposed to survive the holidays? And will Grandpa discover her secret?