.center {
  margin: auto;
  width: 100%;
  border: 3px solid #73AD21;
  padding: 10px;
}

.container {

  margin: 25px;

}

.borderedcontainer {

  margin: 25px;
  outline: dashed 1px black;
}

.child {
     width:200px;
    height:30px;
    
  /* Center horizontally*/
  margin: 25 auto;
  
}

.bigchild {
    width:250px;

    
  /* Center horizontally*/
  margin: 25 auto;
  
}


.racingcar {
    width:100px;
   

}