Security video shows as a 10-year-old boy jumps out of a stolen SUV.
As the child was being placed in a police officer's car, the father jumped over the concrete median and crossed three lanes of traffic to escape.
The 6-year-old girl is OK, but her mother said the daycare tried to brush off the incident.
A new device promises to send alerts to a parent's cell phone to remind them there's a child in a car seat, aiming to prevent hot car deaths.
A 4-year-old girl was trapped inside a locked school bus after she had fallen asleep and no one noticed.
Nearly 40 children die each year being left in a hot car. Last year, that number was 52.