Holly Madison's baby daughter is learning to swim.

The former Playboy model is encouraging her one-year-old daughter Rainbow Aurora, whom she has with her husband Pasquale Rotella, to take up the water hobby.

She told Us Magazine: ''She's taking swimming lessons. She's learning a lot and it's really important.''

The 34-year-old beauty has been keen to teach the tot all kinds of new things since her birth last year and she even managed to get her to communicate via sign language at just eight months old.

She said at the time: ''She's got two teeth now and she's learning sign language.

''Supposedly [babies] can learn to sign before they can speak. It cuts down on a lot of the frustration time, so I've been taking her to sign language class.''

Meanwhile, Holly, who previously dated Hugh Hefner, is hoping to expand her family by the end of the year as she wants Rainbow to have a little sibling to play with.

She said at the end of last year: ''We definitely want more kids sometime soon. Most of next year I'm going to be concentrating on working and stuff, by hopefully by the end of next year.''