Grimm's Large Building Rollers add an interesting twist to the traditional block set.  Increase construction options with these wonderfully tactile and versatile wooden construction pieces. Watch as the element of movement is added as the Large Building Rollers travel across the floor in all directions. Combine with other building pieces to create castles, palaces, and amazing cities. Set includes 25 pieces in a wooden frame made of responsibly sourced wood.  Rollers are 4 cm in diameter, ranging from 2 cm to 20 cm in length.  Best for ages 3 years and older.

This product is recommended by "spiel gut" (good toy guide).

GRIMM'S Spiel und Holz Design 
Made in Bosnia-Herzegovina