Kingda Ka became the tallest and fastest roller coaster in the world, taking both world records from Top Thrill Dragster at Cedar Point. It lost the title of world's fastest when Formula Rossa at Ferrari World opened in November 2010.
I want to know as much information as I can about puppies, since we'll be fostering pretty soon. Someone said (not on Dogster) that they should start wearing breakaway collars at 4 weeks.
Eight weeks old is when training should start. These days reputable breeders are starting their puppy imprinting at 3 weeks until the dog goes to their new homes. Obedience training can be started immediately. You do not have to wait until the dog is mature in order to train them.