Puzzle_v4_1(Continuous path through)

I made a fun modle of developmental game. It's an fourth version extension(Continuous path through). It is easier than the Puzzle_v4 version.

Game Instructions:
1.The modle requires three colors of rollball and the quantities respectively are 12.
2.Shuffling the colors of rollball.
3.Using the sliding block to arrange the colors of rollball.

Enjoy it.
This model was printed using PLA. (fill in 10%，using a lower layer hight 0.2mm，no support)