From left: Prince, Blanket and Paris Jackson
08/09/2011 AT 11:00 AM EDT
They're all grown up!
's children appeared at a ceremony at Children's Hospital Los Angeles Monday to donate some of their late father's artwork to the facility.
Fourteen-year-old Prince, 13-year-old Paris and 9-year-old Blanket Jackson were accompanied by their grandmother, Katherine Jackson, and aunt, LaToya Jackson, as the family donated 10 signed pieces. The children also signed some of them below their father's name.
The sketches, which depict Mickey Mouse, furniture and other objects, will be displayed throughout the hospital.
The three Jackson children have rarely been seen in public together since their father's memorial service