The secret instrument is a "piano".
The secret kitchen appliance is a "rice cooker".
The secret vegetable is "broccoli".
The secret food is a "hamburger".
The secret drink is "tea".
The secret shape is a "triangle".
The secret currency is a "dollar".
The secret fruit is a "banana".
The secret office supply is a "paperclip".
The secret flower is a "sunflower".