Tickle their heart with a card ? surprise them with our love-filled birthday cards 1. Read handwritten and heartfelt birthday wishes on the back of birthday gift card. 2. It will automatically play fireworks sound effects when you open the singing birthday card. And then it will play the happy birthday song, and background lights change colors with song. 3. Make a wish. 4. Find the special mark on the candle light of the birthday gift card - Blow Here, and gently blow out the candle. 5. Enjoy the cheers and applause from the 3d musical birthday card, as if friends gathered around to celebrate this special day together. 6. It will stop working when you close the birthday card. More Details: 1. Exclusive Card Slot --- Designed to hold your message card with elegance, the card slot enhances the aesthetic of this 3D Pop Up Birthday Card. 2. Self-sealable Envelopes --- The envelope is made of 300g/㎡ high-grade papers. The edges of the envelope comes with double-sided tape. 3. Innovative Electronic Control Technology --- These birthday cards can support over 150 repeated uses and battery validity up to 8 months in static condition. These 3d pop up birthday card are suitable for all ages. Unique birthday cards for Women, Men, Boys, Girls, Kids, Mom, Her, Grandma, Dad, Boyfriend, Sister, Daughter, Son, Best Friend, Husband, Wife, etc. These birthday gift card can be customized for birthday age, suitable for age from 1-99 years old. Perfect birthday gifts as 16th birthday card, 18th birthday card, 21st birthday card, 30th birthday card, 40th birthday card, 50th birthday card, 60th birthday card, 70th birthday card, 75th birthday card, 80th birthday card, 90th birthday card, 100 birthday cards . birthday cards for women, birthday cards for men, birthday cards for kids, musical birthday cards, birthday cards for mom, birthday cards for dad, birthday cards for wife, birthday cards for husband, birthday cards for son, birthday cards for daughter, birthday cards for him.