Training Ball
This weighted EVA foam ball is the perfect training tool to help you quickly and safely learn slinging mechanics directional control. Marshmallows can be too light to get a feel for the release. Tennis balls are heavy enough to do some damage. This training ball is a good balance of safety and weight giving you the confidence to jump right into slinging.
Once you feel comfortable with your slinging mechanics and directional control we suggest moving on to tennis balls as a standard practice projectile. Because the training ball is lightweight it can overemphasize magnus effect (curve) over longer distances. Tennis balls will still force you to learn spin control but the margin of error for curve is greater and will give you a more real-world practice projectile.