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From Levi McConaughey to Knox & Vivienne Jolie-Pitt, see which star tots are celebrating their growing independence
Updated: Friday Jul 01, 2011 | 06:00 AM EDT
By: Kiran Hefa
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Beep, beep! Matthew McConaughey's little man, who turns 3 on July 7, zips around his L.A. neighborhood with sister Vida, 18 months, in tow on March 29.
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