I started my babies with bathes when they we little. They get one with each change of seasons, Yep 4 a year, my outdoor kitty sometimes gets a few more.
It's best to get them used to a dryer if you can, some cats hate the sound. But cats can catch a chill if they are wet and then exposed to chilly temps.
Another tip is never use people shampoo! find a natural cat shampoo, not only will it help keep thier coat shinny, but aids in flea free fur too!
Enjoy bathing your baby!!