I made this for a work colleague, we presented it yesterday so now I can share :-)
The blank card was cut on the Silhouette, I used this file from Craftsuprint. It has the card base, a mat and the numbers, all can be cut from a sheet of A4 - I cut the base twice in purple and the mat and numbers in white.
I cut one base in half and embossed it with a folder - I could have just embossed half the main base, but a lot of people had to sign the inside, which would have been difficult on a debossed surface! Then the embossed half-base was attached to the main one.
The numbers were also embossed and then inked with distress inks in purple, teal and pink. I attached them to the white mat and then the whole topper to the card.
Then I was a bit stuck - part of the brief was butterflies, but I couldn't find a butterfly die which looked right, perched on the 50. But whilst looking through the box, I came across the champagne glass and pearly trail, which were perfect. They were die cut in Bazzill Diamond Bling and the small butterflies were punched to match. A few pearls and it was done.
I am very pleased with this - she couldn't open all her cards at the party so I hope she is pleased too .... I'll find out tomorrow :-)