The chuck-it is our Lab's favorite toy.  We have small ones, large ones, orange ones, purple ones.  You can never have too many of these!  Our Lab could chase balls forever.  One of the nice things about the chuck-it is that you can fling it so far.  Your dog gets a lot of good exercise.  Another feature I really appreciate is that you can pick up the ball without getting all slimy.  The smaller chuck-it is good for children to use.  They might not have the arm strength to get the right fling action the larger chuck-it requires.  It also is good for smaller dogs that wouldn't need to run...