<div class="container">
  <div class="child">🌮🌮🌮</div>
  <div class="child">🎩🎩🎩</div>
  <div class="child">✨✨✨</div>
</div>

.container {
  display: flex;
  align-items: baseline;
  
}

.child {
  flex: 1;
  background: deeppink;
  height: 150px; 
  text-align: center;
  display: flex;
  flex-direction: column; 
  justify-content: space-around; 
  font-size: 3rem;
  border-right: 1px solid white; 
  color: white;
}

.child:hover {
  flex: 2;
  background: deepskyblue;
  color: black;
}