Boley Connecting Rings is a new construction toy which teaches both boys and girls spatial thinking and lets their imaginations run wild! Every Bucket contains 50 coloured rings, which means hours of endless fun and engineering education.In addition to brain building, connecting rings will improve the coordination and dexterity of young children, keeping both their minds and bodies active! The discs measure 5.7cm across and are 1.9cm thick.They snap together and apart easily for all ages and levels of motor skills.They come in a great reusable plastic jar with an easy to carry handle.The discs themselves are made from safe and tested polyethylene (PE).The cap of the jar is made from polypropylene (PP).