Prince Louis steals the show on his first official engagement. Prince Louis missed the Coronation Concert last night because it was past his bedtime, but on his first ever official royal engagement he was operating a mini JCB as the family spruced up a Slough scout hut to support the Big Help Out. When the Prince of Wales took control of a digger, Louis jumped into his father's lap as William moved the mechanical arm and grabbed a bucket full of soil before dumping it on a heap. He looked fascinated as William worked the controls of the excavator. And it didn't end there, Kate was seen pushing a wheelbarrow while her youngest son shoveled in sand. He then took control, steering it expertly as his mum supported its weight. Louis also took on some painting for a mural. When his work was done he devoured several toasted marshmallows. Charlotte opted for a s'more - a gooey marshmallow in between two chocolate digestive biscuits. When Louis spotted one going spare his father heard declaring: 'You've made his day' as he chomped away on it. Charlotte was seen delightedly running to help prepare a new path while George, a future king himself, was spotted learning how to use a power drill. #PrinceLouis #PrinceWilliam #KateMiddleton #Royals #RoyalFamily Original Article: http://www.dailymail.co.uk/news/article-12059047/William-Kate-lead-nation-Bank-Holiday-Monday-volunteering-Big-Help-Out.html Original Video: http://www.dailymail.co.uk/video/femail/video-2935261/Video-Prince-Louis-steals-official-engagement.html Daily Mail Homepage: https://www.dailymail.co.uk/ Daily Mail Facebook: https://facebook.com/dailymail Daily Mail IG: https://instagram.com/dailymail Daily Mail Snap: https://www.snapchat.com/discover/Daily-Mail/8392137033 Daily Mail Twitter: https://twitter.com/MailOnline Daily Mail Pinterest: https://pinterest.co.uk/dailymail Get the free Daily Mail mobile app: https://dailymail.co.uk/mobile