One of the neat things about thoroughbred racing are horse pedigrees. Here's a link to a site that will show the horses 4 (or 5) generation pedigree (just type in the horses name and press HORSE SEARCH at the top left):

http://PedigreeQuery.Com

Lots of other sites, with a search on Kentucky Derby 2015, are out there with discussions about the race. You can do just as well as any pundit when picking the last place finisher!!

Sign up, watch the race (loads of celebs there) and have some fun.