Prince William and Kate's fun day in Sunderland: All the best photos

<p><b>The Duke and Duchess of Cambridge spent the day taking in the vibrant arts scene in Sunderland, where they also toured the new bridge called the Northern Spire. Following a week off with their children, Prince William and Kate travelled up north for the engagement on Wednesday (Feb. 21). Kicking things off at the Fire Station, the couple explored the newly converted music and arts hub housed in one of the city's most iconic buildings. Click through to see all the best photos from their day...</b></p> Kate bent down for a chat with two kids who were dressed as mini police. <p>Photo: &copy; Getty Images
Kate was surely reminded of her adorable daughter Princess Charlotte when she chatted with a young fan outside the Fire Station. <p>Photo: &copy; Getty Images
Kate bonded and shared a laugh with children at The Fire Station. The warm mom to Prince George and Princess Charlotte is always a hit with kids! <p>Photo: &copy; Getty Images
A group of young performers at The Fire Station treated Prince William and Kate to a dance while balancing gold pots on their heads. The arts and music hub engages young people in creative pursuits. <p>Photo: &copy; Getty Images
The royal couple watched a group of gravity defying aerial performers while at The Fire Station. Kate wore a floral dress by one of her favourite maternity brands, Seraphine, while William opted for slacks and a sports jacket. <p>Photo: &copy; Getty Images
While at the Fire Station, one of Sunderland's most iconic buildings recently converted into a hub for arts and music, Kate was given a henna tattoo on her hand. She also took home some bindi for Princess Charlotte! <p>Photo: &copy; Getty Images
A closer look at Kate's pretty henna tattoo. <p>Photo: &copy; Getty Images
Kate was in high spirits as she chatted with staff and students at The Fire Station while her henna tattoo dried. <p>Photo: &copy; Getty Images
In her typically animated style, Kate chatted with women at the Fire Station about her pregnancy. The mother of two is expecting her third child in April. <p>Photo: &copy; Getty Images
Kate greeted some children near the Northern Spire bridge before throwing on a hard hat and reflective vest to get a closer look. <p>Photo: &copy; Getty Images
The Cambridges donned protective gear for a tour of the new Northern Spire bridge, which is due to open this spring. <p>Photo: &copy; Getty Images
Prince William tried his hand at fixing a bolt to the newly constructed bridge, looking every inch the handy royal. <p>Photo: &copy; Getty Images
Kate had a laugh at the expense of her husband as he attempted to tighten a bolt on the bridge and joked about how important that particular bolt was to the structure. <p>Photo: &copy; Getty Images
Kate, who is expecting her third child in April, also got in on the action, tightening a bolt on Sunderland's Northern Spire bridge. <p>Photo: &copy; Getty Images
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