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In the second and final part of this special, the kids’ camping trip concludes with more fun and games but, this time around, the younger siblings take their turn in the spotlight as the show’s scientists explore what impact being born later in the pecking order has on small children. While Sussex-based Charlotte, who is five, has brought along her seven-year-old brother Harry, cute-as-a-button George, six, who was incredibly shy when he appeared in the previous series, is accompanied by his brother Jack, eight. Will being around his older sibling boost George’s confidence and help him become more independent or, will he remain in Jack’s shadow?