circle, heart, square & triangle four geometry shape, in & out are different shape for each, 4cm size, make up differ building.

1. circle,heart, square & triangle four different geometry shape,  size in 4cm L & W or diameter.

2. made out off soft rubber material, which is recycle plastic, more safe for kids too, ASTM F963 & CE standard, Phthalate & Lead free.

3. different color will be available.

4. in & out for each shape will be different, circle in & bear out, heart in & apple out, square in & butterfly out, triangle in & clubs out.

5. four shape in & out shape can make up many different building shape, a good kind of building block.

6. a good kind of intelligence goys for kids as well as adults.

rubber building block