When mine were wee, I would sit them (one at a time) on my lap and tell them to watch the candle flame. I always lit a candle for meditations, and that candle would hold their attention for ten or fifteen minutes. These days, our boy has outgrown such things, but our girl is as interested as ever. She's started meditating at bedtime, imagining herself inside a pink bubble of quiet, letting her thoughts slowly drift away. It's a wonderful practice to share with them, and it helps you, too!