Gracie wants to play, but Grandpa is very sad. He accidentally broke the planet while he was tinkering in his workshop, and Gracie's and Grandpa's only hope is to build a space ship and get away from the Earth. They make space suits with big glass helmets and build a ramshackle rocket out of scraps from Grandpa's workshop, complete with a control panel and chairs. But when they blast off, Gracie isn't sure she wants to go to Mars.
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