My mom's Dad, Großvati (pronounced Gross-faah-tee, and Swiss-German for Grandfather) wrote poems, plays, and stories under a pen name. Pius Rickenman. Mom recently found out his nativity play has become an annual tradition in Rapperswill, just down the road from where she grew up.
When we googled it this link popped up.
"Rapperswiler Sternsingen" - a nativity play with procession for all ages.
Our RivKids Christmas play at Riverview has a slightly different target audience.