Make this birthday their best one yet with this fun interactive birthday card from Hallmark that plays the song 'Happy' performed by Pharrell Williams when opened. Product Details Suitable for ages: 14+ years Includes one birthday card and one white Hallmark branded envelope Dimensions/Size: 21cm (H) x 14.5cm (W) Material: Paper Features The front of the birthday card features illustrations of stars and a smiling slice of birthday cake holding a knife and fork with the message: 'Hope this birthday is so HAPPY...' The inside of the birthday card features illustrated stars with the message: 'IT MAKES ALL YOUR OTHER BIRTHDAYS JEALOUS.' Small parts. Follow usage instructions carefully. Warning: Button Cell Batteries are Hazardous (new or used). Keep away from Children. Button Cell Batteries can cause severe or fatal injuries in 2 hours or less if they are swallowed or placed inside any part of the body. If you suspect your child has swallowed or inserted a button cell battery, call the 24-hour Poisons Information Centre in Australia on 131126 or in New Zealand on 0800 764 766 or contact your country's emergency department.