JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
    <div class="child">Child</div>
    <div class="child">Child</div>
    <div class="child">Child</div>
</div>

CSS

.parent{
    width: 100%;
    background: yellow;
}
.child{
    width: 200px;
    height: 200px;
    background: red;
    border: solid 1px #000;
}