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Bing, season 1 episode 4 «Blocks»: air date June 12, 2014. Episode overview, season trailer and the cast of Bing.
Bing is busy building a tower as tall as he is with his blocks, and is upset when Coco arrives and hijacks the blocks so that she can make a rainbow pattern with them instead. When even Charlie wants to play with the blocks, it is clear a new game needs to be found so that they can all play together.