No sure if such a thing exists, but DD has just started to wriggle out of the arm straps in her car seat, even if the straps are tight and I was wondering if there is anything i could get that would stop her doing that. She's 18 months, so in a forward facing seat with a 5 point harness. She puts her arms back in if we tell her to, but I'm not always able to see - if it's dark or i'm driving on my own.