At head of title: Fetch! with Ruff Ruffman "Science activity included!"--Cover. "PBS kids"--Cover.
Summary:
"A broken toilet, a plumber who is on vacation, and some space-camp training make for a hilarious story that Ruff fans will love. Get ready to find out how space toilets work, then grab some materials and follow the instructions to create your own basic water-filtering system."--P. [4] of cover.
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