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Tiny bodies require tiny props.  I often use my stuffed eyebags as a cushion to imrove neck alignment or pelvic tip in supine.  Fabric belts make perfect yoga straps for tiny hands.  Soft lap blankets are perfect for Savasana and even cover the tiny toes up to their nose. 
 
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One of my favorite tracks for yoga music is "Drum Medicine" by David & Steve Gordon.  This CD lends itself well to any form of vivid drum beat, such as first chakra work.
Add a flute for oral-motor/breath work and you have continued the theme.
Another beautiful CD is Carlos Nakai's new work with William Eaton and Will Clipman titled "Dancing into Silence".  This track is soft and flowing.
How about teepee pose to finish the theme?
 
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Everyone loves baby bunnies and animal poses are always a hit with children.  And how do they sound?  Try little kissing sounds or pucker your lower lip against your upper teeth to make a repetitive sucking sound.  You can help your students decide what the rabbit is eating! 

Ofcourse, mommy bunny, pictured below, is never far behind.

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