Join Mr Tumble, sing and sign the colours of the rainbow in I Can Sing a Rainbow. Visit CBeebies at http://www.bbc.co.uk/cbeebies to find even more fun games and videos for your pre-schooler in a safe child friendly environment. CBeebies is dedicated to delighting and surprising its pre-school audience and it remains the UK's most watched and most loved channel for the under-sixes. Just under half of the target audience tune in every week (parents and carers with children aged 0-3 and 4-to 6-year-olds in digital homes) and our reach is over double that of our nearest competitor. Visit us at http://www.bbc.co.uk/cbeebies.