The Germans started “kinderfeste,” birthday parties to celebrate whom?
Correct answer: Children

Deborah
Canadian children are kind but German children are kinder. LOL

toothless beachrat
The term kindergarten helped give this one away...

Angie
Kinder means child in German

Army Brat
addam , I was one of those Children in the Garden. We were living in Kaiserslautern.

Rocking Rosi
Angie, nearly correct. "Kinder" means children. "Kind" is singular. However, applause from Northern Bavaria.

addam
Angie,
and kindergarten means garden of children

addam
toothless beachrat,
I recently watched a yt video about the origin of this word which is what helped me get the correct answer

MertonabbeyinSurrey
Deborah , kinderbueno everyone