Use this scale in and out elements. Make sure to add the base transition class scale-transition.Then add the class scale-outto scale the element down until it is hidden. To start something as hidden,add the class scale-outfirst,and then add the class scale-in to scale the element up until it is shown.

addaddToggle Scale
<!-- Scaled in --><a id="scale-demo" href="#!" class="btn-floating btn-large scale-transition"><i class="material-icons">add</i></a><!-- Scaled out --><a id="scale-demo" href="#!" class="btn-floating btn-large scale-transition scale-out"><i class="material-icons">add</i></a>