Put on your party hats and dancing shoes - D.W. is turning five! When D.W.'s birthday doesn't go as pIanned, she runs away to the magicaI island of Ukubonga. MeanwhiIe, Arthur decides to skip D.W.'s birthday party to go on a schooI trip to the planetarium - but instead of transporting him into outer space, it transports him four years into the future!