The Consumer Product Safety Commission announced new requirements for children's play pens.
More than a dozen infants and toddlers have died in playpen accidents.
Sixteen-month-old Danny Keysar was in a play pen which collapsed and strangled him at a daycare.
"No one at Danny's childcare home was aware of the recall -- not the owner of the facility, not the family who donated the crib, not the state inspector who had inspected the facility just days before," said Linda Ginzel, Danny's mother.
Many manufacturers have improved their products, but regulators worry about previously recalled play pens still being sold at garage sales and second-hand stores.
The new rules take effect in December.