From 1997, Trendmasters produced Blawp the doll that the little girl carried with her. It is about 15" tall, runs on button cell batteries (not included).
"Blawp is an adorable figure just for you. She loves to talk when you hug her! Her tummy changes color when you squeeze it! Lost In Space. It's up to you to take care of your loveable huggable pal - BLAWP".