How To Sync CSS Animations Across Multiple Elements?

I don’t think its possible natively, but you can actually hack similar functionality by using a bouncing wrapper and some position altering

html:

<div id="bouncywrap">
    <div id="bouncy01">Drip</div>
    <div id="bouncy02">droP</div>
<div>

CSS:

@-webkit-keyframes bounce {
    0% { padding-top:1px;}
/* using padding as it does not affect position:relative of sublinks
 * using 0 instead of 0 b/c of a box-model issue,
 * on kids wiht margin, but parents without margin, just try out
 */
    50% { padding-top:5px;} /*desired value +1*/
    100% { padding-top:1px;}
}

#bouncy01,
#bouncy02 {
    margin:10px;
    background: #ff0000;
    padding: 10px;
    border: 1px solid #777;
    width:30px;
       position:absolute;
}
#bouncywrap {
    -webkit-animation:bounce 0.125s ease-in-out infinite;
    position:relative;
    width:140px;
    height:50px;
/*    background:grey; /*debug*/
}
#bouncy02 {
    background: #ffff00;
    left:60px;
    top:2px; /*half of desired value, just a fix for the optic*/
}
#bouncy02:hover {
    position:relative; /*here happens the magic*/
    top:0px;
}

demo http://jsfiddle.net/A92pU/1/

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