Does your dog have teeter troubles? An easy way to get your dog used to teeters is to start (or restart) them on a rocker board. This training tool has just enough motion for the dog to learn, and just enough bang (and a big bang for the bucks!) It’s also very useful for contact training.
I like this obstacle for inside training and puppies. It doesn’t take up a lot of space, and it’s hard for little paws to get smooshed under it when they don’t realize what they’re doing. I especially love that I can use it inside in the winter! My dog and I have a lot of fun playing bang games and directionals on it.