Doggie Duties (Turtleback School & Library Binding Edition)

FOR USE IN SCHOOLS AND LIBRARIES ONLY. Ruff Ruffman has a problem with a capital P. His toilet is broken, the plumber is on vacation, and he does not want to use Blossom's litter box. With the help of show supervisor, Blossom, and mouse assistant, Chet, Ruff decides to become an astronaut so that he can use the NASA space toilets. Will he solve his dilemma before blastoff? Get ready to find out how space toilets work - and how astronauts engage in the ultimate recycling! Then grab some materials and learn to create your own basic water-filtering system.