Which is more practical and useful? Kindermuzik or Gymboree? Or do you have any other suggestions for 2-year old kids?

Depends on your child's development also! If you want to encourage speech, go for Kindermusik. If it's about physical milestones, Gymboree is good. My daughter was ahead in terms of physical milestones so we went with Kindermusik and she loves it!