There are some very strict safety regulations in the us that attempt to insure the safety of toys that are sold. But in spite of the strict regulations solutions from time to time where unsafe toys make it into the market.
Overall the regulations that are in place to ensure toy safety have already been very successful. When compared to the number of toys that are in love with the market each year there have been very few incidents that had been caused by unsafe or defective toys. Most accidents originate from improper usage or common accident including tripping on them.