Best type of pen for autographs?

[pennymom]

This sounds sort of dumb, but what type of pen would you recommend to go with an autograph book? It just occurred to me that some of the characters might have a rough time with those big, fuzzy hands ! Any suggestions? Thanks!

Only 22 days to go!!!!!!! I hope Mickey looks the same as he did in 1982 when I last saw him!!!

 

[WDW Poly Princess]

They seem fond of sharpies. Just be sure the book you're using has thick enough paper that it won't bleed through.