A nurse is reviewing safety measures with the parent of an 8-month-old infant. Which of the following statements by the parent indicates an understanding of safety for the infant?
1) "My baby loved to play with the crib gym, but took it out of the crib."
2) "I just bought a soft mattress so my baby will sleep better."
3) "My baby really likes sleeping on the fluffy pillow we just got."
4) "I put the baby's car seat out of the way on the table after putting him in it."