Tell each of them individually that they are the favorite but not to tell the others this fact.

Have a family meeting with all my children. Produce a sealed folder. Tell them its a new will and the favorite child will get everything. Watch chaos unfold while eating a Filet o Fish sandwich. Take too big of a bite and die. Inside the folder is a Polaroid of me and Jeffrey Epstein with our names on the back written in glitter ink.