Michael Jackson‘s son Prince Michael II cries himself to sleep every night.

The late pop star’s seven-year-old son, known as Blanket, is so distraught about his father’s death that he constantly asks where his “daddy” is and sobs in his bedroom.

A Jackson family friend said, “He cries himself to sleep and keeps asking where his daddy is. His aunt Rebbie spent the first few nights sleeping on a cot bed beside him because he was scared to sleep alone. He acts pretty wild during the day.”

Michael’s three children, 12-year-old son Prince Michael I, 11-year-old daughter Paris and Blanket, have been looked after by their legal guardian and grandmother Katherine Jackson since the “Thriller” singer’s passing.

While the youngest sibling is visibly emotional, Paris is reportedly coping with her grief in quieter ways: “Paris does a lot of reading and watercolor painting and hair-braiding with her cousins, who visit every day and she speaks regularly to a handful of friends on her mobile phone.”

But the eldest, Prince, has caused such concern by spending hours playing computer games—Katherine has had to put time restrictions on his internet sessions: “Katherine makes sure that internet access is monitored and time-limited around the house.”

Meanwhile, educational consultant Tony Buzan, who was employed by Michael to help give him tips on raising the children, has spoken about how close the three kids were to their father:

“I would watch them coming and going from the international school every day. They left happy and came back happy. On their return, those three kids could not run any faster from the car to get to their daddy. The kids seemed to enjoy each other’s company. It’s unusual in groups of three, where tensions can often arise.”