module torus(major_radius, minor_radius, $fn=10) {
    rotate_extrude(convexity = 10)
    translate([major_radius, 0, 0])
    circle(r = minor_radius);
}

module rounded_cube() {
    minkowski() {
    
       
        union(){
            sphere(r=2, $fn=10); 
            /*
            difference(){
                rotate([180, 0, 0])
                cylinder(d = 10, h = 3, $fn=10);
                torus(major_radius = 5, minor_radius = 3);
            }
            */
        }
        
        cube([10, 10, 10]);  // Base shape
        
    }
}

rounded_cube();
// Example usage
/*
union(){
    sphere(r=2, $fn=100); 
    difference(){
        rotate([180, 0, 0])
        cylinder(d = 10, h = 3, $fn=100);
        torus(major_radius = 5, minor_radius = 3);
    }
}
*/