Hagoita is a wood board. At Muromachi era, it was used like a racket de tennis to hit a shuttlecock. During Edo period, after Muromachi era, Hagoita came to be used as decorations to pray for girls health. And such practice continues to this days.
I took this picture at Kasukabe Saitama, where annual Hagoita festival is organized. if we are lucky, we can see how Japanese Hagoita craftsmen create this traditional art there.