Scratch postcard Grandfather or grandpa?

HOW DO YOU WANT TO BE CALLED YOU? GRANDFATHER OR GRANDPA? Postcard to offer to announce a nice news! How to use: Nothing could be simpler, scratch & discover the message that is hidden under the golden heart. Postcard information: • Paper: 100% Recycled FSC© • Colour: sun powder with golden inclusions. • Dimensions of the postcard: 10 x 15 cm • Weight: 250 gr/m2 • Environmental certifications: ECF, FSC, ISO 14001, ISO 9001. • Designed in Toulouse & Made in England. Scratch heart information: • Heart to scratch: 8 x 7 cm • Gold color Kraft envelope information: • Paper: 100% recycled Kraft, environmentally friendly and acid-free. • Dimensions of the envelope: 11.4 x 16.2 cm • Weight: 110 gr/m2 • Made in UK Blister information: • Material: 100% compostable light corn starch • Size: 12 x 16.2cm • Made in UK