Edushape is recalling Giant Starbuilder and Giant Stars building sets.
The Consumer Product Safety Commission says the plastic knobs can break posing a choking hazard to children.
The Giant Starbuilders and Giant Stars sets were sold at small retail stores or on-line at Target.com, Toys R Us.com, Amazon.com and Walmart marketplace.
They were available from January 2007 through May 2010.
Take star blocks away from children and contact Edushape for a replacement set or credit.
Call 1-800-404-4744 or go to the website edushape.com.