animate.css/source/attention_seekers/tada.css

@keyframes tada {
	0% {transform: scale(1);}
	10%, 20% {transform: scale(0.9) rotate(-3deg);}
	30%, 50%, 70%, 90% {transform: scale(1.1) rotate(3deg);}
	40%, 60%, 80% {transform: scale(1.1) rotate(-3deg);}
	100% {transform: scale(1) rotate(0);}
}

.tada {
	animation-name: tada;
}