Ruby Roo learns how to make invisible ink but how does she make her message visible? Find out in today's episode! Check out my channels! Ruby Roo: https://www.youtube.com/watch?v=TkGL1... Ruby Roo Magic Wheel: https://www.youtube.com/watch?v=vruJK... Sandaroo and The Super Kids: https://www.youtube.com/watch?v=plz1o... Morphle: https://www.youtube.com/watch?v=rHLlP... ❤ Follow Us ❤ https://www.instagram.com/disneycartoys/ https://twitter.com/DisneyCarToys https://www.facebook.com/pages/Disney... https://plus.google.com/+DisneyCarToys #science #besafe #rubyroo #sandarookids #stayhome #activities