This is a book from the 1990’s because I remember buying it for my son who was born in 1989.  It was about a doll family, or a tiny statue family who lived in the bathroom (?) and a child played with them when they took a bath.  At some point one of the statues/dolls gets lost– grandfather or grandmother and they think it blew into the garden when the window was open. They all decide to go look for the missing statue, and have adventures in the garden.  They find the statue and it ends with the grandma and grandpa dancing together.  Beautiful colored illustrations.d