Tutorial for crocheting a pumpkin.
Material recommendation:
Wool - something like that for not Europe
http://www.amazon.com/gp/product/B0042TQJFU/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0042TQJFU&linkCode=as2&tag=wwwcrochetd0e-20&linkI