One of the best workout/exercise gizmos I've gotten this year is a JumpSport Fitness Trampoline. I don't actually use it for jumping though. I'm too chicken for that. Instead, I apply JumpSport's PlyoFit Adapter accessory which angles the trampoline and allows it to be used as a medicine ball rebounder.
When I was a kid I used to love throwing a baseball or tennis ball at one of those old school bounce back pitchback nets. Now as a fortysomething year old dude I get to have that same level of fun again, while also getting a great workout.
Sometimes I use a 10lb Amazon Basics medicine ball and this trampoline rebounder can take everything I've got when I throw it at it. Even better than that medicine ball is the D-Ball Indoor Shot. Tossing a 10lb D-Ball at the trampoline really gets your heart rate going. For a lighter weight but faster-paced alternative I like to use the Driveline 2000g (4.4lb) Plyo ball. Their black color ball.
Working out can be a chore. I try to make it enjoyable - always. A twenty-minute high intensity workout with this trampoline rebounder is about as good as any other exercise option I can think of. And since it feels like play you end up having fun the whole time.
PS: you can also do a cool type of squat using the angled rebounder!