Use craft glue to stick a puffy white snowflake in each of the sunken squares of the card.
Glue a blue diamond in the centre of each.
Once dry use the silver peel off letters in the centre to spell out 'SNOWFLAKE'. You may find this easier with tweezers.
Complete the card with the silver snowflake peel offs across the bottom, you may find it easier to place these if you mark very faintly with a pencil where each will go beforehand.