Got problems in scanf() program

/* This is a sample program that asks users for some basics data and
prints it on screen in order to show what was entered */

#include <stdio.h>

main()
{
    //Set up the variables that scanf will fill

    char firstInitial;
    char lastInitial;
    int age;
    int favorite_number;

    printf("What is your first name?\n");
    scanf(" %s", &firstInitial);

    printf("What is your last name?\n");
    scanf(" %s", &lastInitial);

    printf("How old are you?\n");
    scanf(" %d", &age);

    printf("What is your favorite number (integer only)?\n");
    scanf(" %d", &favorite_number);


    printf("\nYour intitials are %s.%s. and you are %d years old", &firstInitial, &lastInitial, age);
    printf("\nYour favorite number is %d.\n\n", favorite_number);

    return 0;
}