12 Various Puzzie Pieces combine to be a cube. ‧Be an educa ional toy for children 1. Start from combining the last piece. 2. Combine the last 2 or more neighbor pieces. 3. Combine totally 12 pieces. 4. An IDEA CUBE has 4 combinations. Two IDEA CUBE have 10 combinations by exchanging certain pieces. 5. You can stick the 2 inner cubes to be a long cube then combine the puzzie pieces to challenge the diffeculty.
