Function: 1. Principle: Show the flying function and dynamics of the butterfly toy, relying on the twist of the rubber band to produce an upward force, and the toy will fall down after releasing the twist of the rubber band. 2. Realistic butterfly design: bright and delicate color, overall looks exquisite and beautiful, attracting people's attention, suitable for minors aged 7 to 14. 3. Reusable: The flying butterfly toy can be used as bookmarks, greeting card decorations or a perfect gift for girls and boys. You can put it in a book or greeting card to surprise a friend. 4. Easy to use: hold the butterfly tail in your left hand and don't move, turn the butterfly head in your right hand about 40 times, then release your hands at the same time, then you can see the butterfly fly out. 5. Plastic and paper: 10 pieces of wind-up butterfly toy are available to meet your different use needs. Adopts plastic and paper, environmentally friendly, wear-resistant and durable. Specification: Item Type: Flying Butterfly Toy Material: plastic, paper Weight: 76g / 2.7oz (approx.) Applicable age: minor (7-14 years old) Product Size: Approx. 11.5 x 11.2 cm / 4.5 x 4.4 inches How to use: Hold the butterfly's tail in your left hand and do not move, rotate the butterfly's head in your right hand about 40 times (or even more times), then release your hands simultaneously or put it in the book and let your friend open the book and you will see the butterfly fly out. Package List: 10 x instruction card 10 x butterfly toy