Can we initialize Base class member struct variable in Derived class

The question is as above. Let say I have the following code

struct Detail{
    int cost;
    int age;
    bool danger;
    unsigned char country=[3];
}

class Toy{
public:
     Toy();
     virtual ~Toy();
};

I know that I could initialize Detail struct in the Derived class, say doll, in this manner

class doll: public Toy
{
 public:
     doll();
     virtual ~doll();

     Detail detail={4,12,false,"CN"};
};

However, I am thinking of how to push Detail struct to the Base class Toy as I have more than one Derived class with differing unique details(the fields of Detail for each Derived are the same but not the value). This sounded more appropriate to me as well.

But how could I do an initialization of the struct from Derived class? I am working on c++ by the way

[EDIT]
I intend to place the Derived object ptr into Base class list

Somewhat like this

 std::vector<Toy*> toy list;
 doll* one = new doll();
 toy_list.push_back(one);

 Leggo* two = new Leggo(); // another class that Derived from Toy
 toy_list.push_back(two);

So that I can eventually use the list to obtain value for individual item

  for(auto obj: toy_list)
  {
       printf(" toy is from %d \n", obj->detail.country)
  };

Thanks

A derived class can only initialize its own members and direct base classes.

If detail is a member of a base class, the base class should provide a
protected constructor able to initialize that member, and the derived
class should use it.

Here is some code showing that. I have made the detail member const to prove
that is is only initialized at derived class construction:

struct Detail {
    int cost;
    int age;
    bool danger;
    unsigned char country[3];
};

class Toy {
protected:
    Toy(Detail&& detail) : detail(detail) {};

public:
    const Detail detail;

    virtual ~Toy() {};
};

class doll : public Toy
{
public:
    doll() : Toy(Detail{ 4,12,false,"CN" }) {};
    virtual ~doll() {};

};