Kate Middleton has been seen sharing some sweet moments with young children during a royal engagement on Tuesday 8 February.The 40 year old, who reportedly has a "top secret room with a tunnel" in her Kensington home with Prince William, was pictured arriving at PACT (Parents and Children Together in Southwark, where she learned more about how communities can support parents and their families with their mental wellbeing and improve the health and development outcomes for young children.The Duchess of Cambridge dressed stylish and professional for the occasion as she donned a simple black shirt with a pair of matching trousers, belt and some velvet block heels. She teamed the outfit with a grey checked blazer and accessorised with a sapphire pendant necklace alongside dangling pearl earrings.