Here are some links to resources about Garuda for use with children:

First some images on Youtube to the backing track of Amy Lee (Evanescence)  – one of my all time favourite artists:

Next, the story of Garuda:

 

Finally, some episodes form the tale of Garuda:

http://www.dailymotion.com/video/xhqhm8_lord-krishna-garuda-birth-of-garuda-kids_fun

http://www.dailymotion.com/video/xhqh9y_lord-krishna-garuda-great-devotee-kids_fun#rel-page-1

http://www.dailymotion.com/video/xhru5m_lord-krishna-garuda-garuda-save-his-mother-kids_fun#rel-page-2

 

Some legends which may easily be simplified for children:

http://www.sacred-texts.com/hin/hmvp/hmvp44.htm