The best replacement for balls is hatchet.

The best alternatives to balls are rated as following:
★★★★★  hatchet
★★★★★  guts
★★★★  dyrus
★★★  birth
★★★  nuts
★★★  osborne
★★  strikes
★★  giving birth
★★  neocube
★★  childbirth
★  buckeyes
★  regular balls
★  ceramic rings
★  ovaries
★  loose balls
★  round balls
★  zen magnets
★  birth pain
  pops
  mens
  buckyballs
  short balls
  swing speed
  live rock
  callaway

Your alternative for balls is not listed? Suggest!
Speaking about balls, one probably shouldn't forget about replacement probability.

Other search terms related to balls and their ratings are:
★★★★★ replacement probability
★★★ faces toy
★★ string
★★ bells
★ rubber strings
strings toy
You have in mind a companion for balls and it is not yet here? Propose!



Google Trends

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balls
hatchet
guts