How to set multiple collision box to a pawn?

hi,
Looking for days to create a pawn with several collision boxes , without success .
To simplify my pawn is a cube provided with 2 eyes and a mouth . 2 collision boxes are made visible for understanding (red and dark yellow in the picture below)
I wish my pawn to not enter the table on front of it (collision preset=block all) : it works with the red collision box (witch is the root scene) but not with the yellow one :confused:

is there a way to do this (making multiple collison boxes that react on collisions) ?

Thanks for your answers.
n.b. : don’t let the ducks eating the table !

48424-nocollision.jpg

Did you find a solution?