MantaRay- Thanks for replying. He is about 6.5kg now. I would like to hold off turning him around for as long as possible. Jake sits next to his seat in the car, so he has someone to talk to. Zac is on the other side of Jake, so hes the only one that cant talk to him. Ive checked his straps, and they seem ok. They go from above his shoulders, so they are high enough. He has always been a 'nosy' baby, wanting to know whats going on, so Im sorta presuming he just wants to sit up like everyone else, so he can see more.