Why is this only for boys?

DIY for BOYS-Speed Machines
(Source: http://www.amazon.com/Speed-Machines-Boys-Ruth-Owen/dp/1477762744/ref=sr_1_5?s=books&ie=UTF8&qid=1443704349&sr=1-5&keywords=diy+for+boys)

I saw this book on the shelf at my local library and the questions started.

Why is this DIY book only for boys? My daughter has a skateboard, she love one of those carts, and we make paper airplanes all the time.

This book was published in 2014. Have we not moved a bit beyond this sort of gender stereotyping? The publisher, Rosen Publishing, does not publish a corresponding "DIY for GIRLS" series, but does offer a bunch of "MAKER KIDS" books, many of which feature girls on the covers.

High-Tech DIY Projects with Musical Instruments
(Source: http://www.rosenpublishing.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=156693&category_id=768&option=com_virtuemart&Itemid=1)

I'm not complaining about the content of the DIY for BOYS series. Books on going fast (Speed Machines), camping out (Roughing It), and generally goofing around (Practical Jokes) are great, but they are great for boys AND girls. Why not just call it DIY for KIDS?