You can find diffrent templates of this card by googleing diaper card. Soo cute! :)
Inkido papers are awesome to use as these cards. They are cute, and doblesided witch is very good! I've decorated them lightly since you probably are making many for a christening. :) The stamp with the text is also from Inkido and are fantastic!
I had to make a blue version of the card to. Same template, different color! Hope you like the idea! :)
Have a crafty day!