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How Lego Patents Helped Build a Toy Empire, Brick by Brick | Innovation| Smithsonian Magazine
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LEGO DUPLO All-in-One-Box-of-Fun Building Kit 10572 Open Ended Toy for Imaginative Play with Large Bricks Made for Toddlers and preschoolers (65 Pieces)
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Doblo factory - EduTech Wiki
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Doblo factory - EduTech Wiki
LEGO DUPLO Classic Creative Building Time 10978 Bricks Box, Learning Toy for Toddlers & Kids 18
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![Toys] Which is better: Lego Duplo or Mega Bloks? – Mummy's Reviews](https://www.mummysreviews.com/wp-content/uploads/2011/07/LEGO-DUPLO-and-Mega-Bloks-compare-sizes.jpg "Toys] Which is better: Lego Duplo or Mega Bloks? – Mummy's Reviews")
Toys] Which is better: Lego Duplo or Mega Bloks? – Mummy's Reviews
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history - What sizes of bricks (building scales) have carried the Lego brand name? - Bricks
LEGO DUPLO - The larger size of the DUPLO brick is perfect for little hands and helps avoid choking! | Facebook
