My 21 month is really testing me and sadly winning! He will not get into his car chair!! I don't mean he winges and wines I mean he has a complete meltdown, screaming, crying he will make his body rigid, kick and slap, , if by chance I do manage to get him strapped in, 2 min into journey he will wriggle his arms out so I have to stop the car and start over. He will keep doing this doesn't matter how many times I put his arms in. I do the straps as hard as possible, he only wears a t- shirt and I pull it very tight but he still does it. I actually dread going out in the car now and have resorted to the bus for going into town. HELP!!!