Which car seat would be the hardest for a toddler to get out of? I know that the Maestro I was messing with in Target had a chest clip that was really hard to get undone. Do any of the Evenflo convertibles use that chest clip? My 2yo niece has been undoing the chest clip on her Radian. My sister has been trying positive reinforcement which worked for a short time before she started up again. Then spanking, but IDK how that was going. She accidentally left her Radian in our mom's car and had to use her Regent yesterday. She was almost home when her dd was standing right behind the middle console. She undid everything, chest clip and crotch buckle. She wants to keep her rfing to at least 3 but right now anything would be safer than what is going on. Sis thinks that if she couldn't get the chest clip undone, she wouldn't be able to get to the crotch buckle. Maybe. Any ideas?