When 11-year-old Andrey Sidorov fled Ukraine for Ireland, he had to leave his Lego collection behind. But thanks to an overwhelming response to an online appeal by his father, he is now building again. "A lot of people sent us lots of boxes, new Lego, used Lego," said Mr. Sidorov. "He's very happy." Hundreds of viewers have subscribed to Andrey's YouTube channel, which he began at his home in Kyiv and where he posts videos of his creations.

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