Let your dog choose which ball to fetch with the Chuckit!Â® Fetch Medley. This 3 pack of fetch balls comes with 1 Chuckit! Max GlowÂ® Ball, 1 Chuckit! WhistlerÂ®, and 1 Chuckit! Rebounce Ball. For night time play, grab the Max Glow Fetch Ball that glows bright in the dark and makes it easy for your dog to find. Use the Chuckit! Whistler to grab your dog's attention as it whistles though the air. For a higher bounce during playtime, use the Rebounce ball. Each ball is sized medium and is compatible with medium Chuckit! Launchers. Make Fetch HappenÂ® anywhere, anytime with the Chuckit! Fetch Medley.