Laugh & Learn Smart Stages Sis is soft, cuddly, and she's ready to make sure learning fun never ends. She responds to your baby's touch with exciting sing-along songs and phrases that introduce more than 100 first words, parts of the body, colours, shapes and more. And because every baby develops at their own pace, Sis comes with Smart Stages technology, so you can choose the level that's best for your child. There are a variety of songs, sounds and phrases within each of the three levels of play. And Sis's light-up, multicolour heart even twinkles along to the music.