Yellow and blue balloons filled the sky above Norwich's City Hall this evening, as families turned out to mark World Down Syndrome Day.
And as the dusk fell the civic building, along with Norwich Castle, was lit up in the colours in support of those with Down Syndrome.
The Norwich event was organised by Emma Taylor and Zoe Lee, whose sons Eli and Mason both have the genetic condition which means they have an extra chromosome.
The pair were born just a couple of months apart, and live close by each other in the north of Norwich.
They see each other almost every day and also have friends much further afield, as they share a Facebook page, charting some of their day-to-day adventures and achievements.
Their mothers organised the event this evening, and Mrs Taylor spoke to thank people from the Norwich and Norfolk Down Syndrome community for coming along before balloons were released. Mrs Taylor said: 'The event tonight is important because sometimes there is a lot of negative publicity about Down Syndrome, and we like to celebrate the positive side.'
Celebrating their children and the joy the two two-year-olds bring is another reason for starting their Facebook page, Best Buddies and their Adventures.
They believe it is the only page devoted to two young friends with Down Syndrome and helps their families reach out to people all over the world.
And although the youngsters are the best of friends, their mothers support each other too. They were both pleased with the turnout to tonight's event.
'It's a recognition of something which is so important to us,' Mrs Taylor added.
And attendees also recognised the importance of the day, by supporting an initiative known as #lotsofsocks, where supports wear brightly coloured socks in the hope people will ask why, and can then be told about World Down Syndrome Day.
Some even wear three socks, as while chromosomes usually come in pairs, someone with Down Syndrome would have an extra one.
The specific day marked to raise awareness for Down Syndrome is poignant as it is the 21st day of the third month – to signify the triplication of the 21st chromosome.
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