She is going to help to take care of her newborn baby brother and sisters. She need to help the baby to take bath, change diaper, feeding the milk, change clothes etc.
Before taking a bath, Belle need to prepare many things, like thermometer to check the water temperature, toys for the baby when they taking bath, soap, shower and lotion.
After that Belle will go to bed with the baby. Some of them may like to have some milk before they sleep and some may like to play with their toys.
Finally, when the baby weak up, Belle will need to change some beautiful clothes for them and go out with them.