Complex sentence: Having the penguins around helps Popper to become closer to his children and he begins dating their mother, Amanda Popper (Carla Gugino), again and his children for the first time are happy to stay nights with him.
Split into simpler sentences: Having the penguins around helps Popper to become closer to his children. He also begins dating their mother, Amanda Popper (Carla Gugino), again, and for the first time his children are happy to stay nights with him.