#block-bean-sierra-coolschools-hp-300x600  {
  width: 300px;
  height: 600px;
  margin-bottom: 16px;   
}

#block-bean-sierra-coolschools-mobile-300x50 {
  margin: 0 auto;
}

#div-gpt-ad-1438626525349-0 {
  margin: 0 auto;   
}

@media screen and (min-width: 800px) {
  #block-bean-sierra-coolschools-mobile-300x50 {
    display: none;
  }
}