A laugh-out-loud motocross adventure perfect for ages 4-10!Engines roar, mud flies, and one extremely grumpy grandad discovers that you're never too old for a little excitement.When young Chestor discovers Old Thunder-Grandad Dan's dusty, long-forgotten motocross bike-he has no idea he's about to spark the wildest adventure Gear Town has ever seen! With the help of Nigel, the calm but brilliant mechanic, Chester convinces Grandad Dan to enter the town's big motocross championship.There's only one problem...Grandad Dan complains about everything.The weather. The mud. The cheering. The chickens.Especially the chickens.But as the trio race through flying feathers, rattling bolts, muddy mayhem, and a few spectacular wipeouts, something unexpected happens-Grandad Dan remembers what it feels like to have fun.