This is a project 30 something years in the making.
When I first got into toy making way back I bought a toy making book The Great All-American Wood Toy Book by Norm Marshall
and I build a bunch of the toys in the book cranes, planes trucks,graders and a bunch more but one I have always liked and never built well now I have, but just a touch fancier that what's in the book.
Here's the blog of the build.http://lumberjocks.com/htl/blog/89946
It's made with oak,cherry, and walnut.
I have four days in this build.