I am looking for a children’s book that I read in primary school, and I’m afraid I have no recollection whatsoever of the title. One of the main characters is a toymaker whose workshop is in a mountain: his character is definitely ambiguous, sometimes actively malevolent. There are children, perhaps siblings, who are other characters who have to deal with him. The toys may come to life?
Other hints: my recollection is that there may be more than one book in the series; the setting is in Austria, or Switzerland or some similar mountainous European locale, and the feeling was definitely of fantasy.
Maybe the strongest marker would be the date of publication. I think it would have been published in the 60s or 70s, certainly no later. I was born in 1965 and was reading it at ages 7-12 or 13.
I have already searched Loganberry Books Solved Mysteries, and not found it; nor has a preliminary search on Google produced anything.
Thank you VERY much for whatever help you can give