yes they do my daughter taught my male how to climb....she also uses them to getaround the block she races the other kids her on her scooter and the 2 dogs against the other kids on there bikes.......and my dogs are 10 years old...usualy she wins ....when we go to the sand dunes my wife runs them with the daughters LT80 i had to put a pipe and regear it to keep up with the dogs ........about 4 miles and they are ready for a nap......i had to put up a 5 foot fence to keep them out of the garden also...and every year i use 4 80lb ready mix concreat bags as weight in the back of my truck after the winter is over i put them in the ground to keep the dogs from diging out....