I used piknik.com to sharpen a really cute pic of DS I took when he was 5 weeks old. Then I used words to add to the pic announcing his baptism, where it was, what time and that a party followed. Then I saved it and emailed it to everyone. They LOVED it and it was Free!
Re: Where are you getting Christening invites?
I think I'm going to use this etsy seller; pay $12 for the file and then send to Costco for printing (under $4 for around 30 prints).
https://www.etsy.com/listing/44462615/baptism-or-christening-custom-digital?ref=sr_gallery_12&ga_search_query=christening+invites+invitations+birthday&ga_search_type=handmade&ga_page=&order=&includes[]=tags&includes[]=title