Songkran ผูกแขน Ceremony

Every year at Songkran I find myself in a ผูกแขน ceremony where I'm tying a string on one of the village elders. In the past I've mumbled my way with a few good wishes in English.....this year, I'd like to do it in Thai.

Something along the lines of ในวันสงกรานต์นี้ขอให้ความสุข สุขภาพ ร่ำรวย

Can anyone help out or provide a link to some standard 'best wishes' in Thai for birthdays and other celebrations like Songkran?

Thanks from Udon