When I get the chance I think it is much nicer to make cards to celebrate special events, rather than buying them. Our friends got married last week, I fashioned a really simple card to celebrate the occasion.
Normally I let Kit loose on all our cards, but he was busy doing important toddler stuff in his toy hospital so he didn't contribute.
All the card was, is a piece of folded one side coloured card folded, with a luggage tag tied around the fold and secured with washi tape. I just wrote of the luggage tag, and wrote the names on the back, and decorated with stickers.