#parent-div {
  width: 500px;
  background: #BDBAC2;
  padding: 20px;
  margin: 5px;
  float: left;
}

#box-one {
 	background: #5497FC;
 	width: 70px;
  padding: 20px;
  margin: 5px;
  float: left;
}

#box-two {
  background: #17A4BA;
  width: 70px;
  padding: 20px;
  margin: 5px;
  float: left;
}

#box-three {
  background: #84B12B;
  width: 70px;
  padding: 20px;
  margin: 5px;
  float: left;
}