This is a classic brain teaser riddle.

Children learn colors rainbow fish lollipop color tray circle

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200 wooden track balls and large wave boards in multiple colors were tested successfully

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How could a six-piece T-shaped puzzle fit in?

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Topology puzzles from childhood

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Wooden track ball, tested successfully

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Cardboard track ball, rotating elevator successfully tested

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The Impossible Twelve Copper Pillars

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Ultraman found in the mud, how many can you recognize?

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Designer, can you translate for me, what the hell is called “stress relief toys”?

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Children's toys: use rainbow candies to bathe the baby

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Children's handmade toys make rainbow feet with rainbow candies

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[DIY] Making A Rainbow Feet With Different-color Slime

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Action Figure|Dig out so many toy cars in the mud

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Action Figure|ToriTori Color-changing Toys for Children

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Anime|Children's Early Education Animation| Excavator

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Children learn color mixing rainbow candy and big hand cutting

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Kids Toys Handmade DIY Miniature Homes Build Round Swimming Pool Bedroom Kitchen Living Room with Ca

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Wow! What makes excavators, mixer trucks, dump trucks, and construction vehicles purple?

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Pajama heroes build an ice cream car

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Can you tell at a glance how it's put together?

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