Yellow Castle Bricks® is not affiliated with the LEGO® Group. LEGO® is a registered trademark of the LEGO® Group of companies, which does not sponsor, authorize, or endorse these programs or this website. Some LEGO® sets contain small parts that are NOT suitable for, and may pose a hazard to, children under 3 years of age. LEGO® DUPLO® sets have larger pieces which are specially designed for children under 3.