This recall involves the Fisher-Price Trikes and Tough Trikes toddler tricycles with model numbers listed in the chart below and that have either a disc-shaped or D-shaped pretend key. The model numbers are located under the seat in the storage compartment. The trikes are intended for children 2 to 5 years of age. The pretend keys are located about 3 inches in front of the seat and protrude at least 5/8 inches above the trike's body. The trikes manufactured after June 16, 2010 are not included in this recall. These trikes have a modified key in a flattened D shape (see picture below) and a manufacturer run number higher than 1670Q2. The run number indicates the trike was manufactured on the 167th day of 2010 or on June 16, 2010. The run number is found under the seat below the model number.  Sold Mass merchandise stores nationwide from January 1997 through September 2010