1. Two Column Grid:

            
                <div class="grid-container grid-columns-two">
                    <div class="child1"></div>
                    <div class="child2"></div>
                </div>  
            
        

2. Three Column Grid:

            
                <div class="grid-container grid-columns-three">
                    <div class="child1"></div>
                    <div class="child2"></div>
                    <div class="child2"></div>
                </div>