Springtime on Titan

A cardboard rocket, a cosmic tyrant, and a revolution that's about to . . . spring into action!Siblings Sally and Alex, along with their fearless dog Laika, never intended for their backyard rocket to leave the ground. But when they fueled their cardboard ship with shimmering meteorite dust, "playing pretend" became a sudden countdown. A flash of red sparkles hurled the trio across the stars in a vessel held together by little more than duct tape and hope.After a rough landing on Saturn's largest moon, Titan, they discover a hidden subterranean world where the locals are forced to produce a "bouncy planetary shield" for a cosmic tyrant. To save the Solar System and find a way home, they must join forces with a resourceful local named Moxi, needing courage, gravity-defying gadgets, and the ultimate power of teamwork to spark a spring-loaded revolution.