I don't know the game. No idea what you're taking about... Buuuut:
Yup. Everyone got to open a layer including birthday boy.... last layer which any sane parent turns around for OR chooses the one of their kids friends they like the most, was instead deliberately given to birthday boy
So. Rigged or not rigged? Because if the birthday child simply got it then that's that..
intentionally choosing any child (singling out the child you like the most) seems even worse to me.
But maybe there's something I'm missing. So don't mind me😅