Hi our son is about 2 years and 3 months old and he has decided that he doesn't like being strapped into his carseat. As soon as I pull out of the driveway (sometimes before), he will slip his arms out of the shoulder straps so he can see out the window. The bottom buckle is still strapped in so he can't take his legs out. We have the five point harness but even if I make it nice and snug on him he still manages to wiggle his shoulders/arms out of the straps and refuses to put them back in. What do i do to keep him buckled in? Or to convince him not to get out of the shoulder straps?