Youngsters are oddly flexible. When changing their diaper, it doesn't faze them that their feet are positioned easily by their ears. Encourage that ability to reach between their tiny legs with spider–like agility by giving them their own yoga mat.
Pint size yogis will enjoy the child sized Pottery Barn Kids (on sale for $20) elephant and hippo shaped mats. The large creatures will add a little flair and a lot of smiles to the standard downward dog and tree poses.