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After the appearance of a mysterious toy chest, Frankie Foster disappears! Inside this chest, Mac and Bloo and the gang discover an entire Imaginary World. They must navigate through this magical yet treacherous land.
Bloo and the Friends think Mac is moving away forever, so they set out to make his last day at Foster's the greatest he's ever had.
Several recently adopted Imaginary Friends start to paint a less-than-rosy picture of life outside the house through a series of letters sent to Foster's.
What starts as an innocent dare turns into a house-wide competition that pits the friends against each other in a bid to win the title of Dare Champion!
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- Premiered: August 13, 2004
- Rating: TV-Y7
- Premise: An 8-year-old boy named Mac and his imaginary friend Bloo share adventures. (more)