Slow Down, Sara!

出版者:Lerner Pub Group

作者:Driscoll, Laura/ O'Rourke, Page Eastburn (ILT)

页数:32

价格:$ 6.72

装帧:Pap

isbn号码:9781575651255

Ben is worried when his friend "Speedy" Sara slows down just before the soapbox race, but she is using science to improve her chances.