Sarubobo is a Japanese good luck charm, it was a doll often made for children associated with Takayama. My parents recently went on an anniversary holiday to Japan and visited the temple there and brought me back one.
They are faceless as they’re supposed to reflect you, and with the idea of good luck behind them mothers and relatives would give them to children. In Japan they believe children should always be happy. So the Sarubobo doll is supposed to be a colourful reminder. They usually wear a little traditional outfit, some have Japanese characters. I’m not an expert in translating as they have two alphabets and I know very little from my studies into it, but I reckon some would have words for things like “Courage” or “Joy”.