Maybe buy some Cars jocks and a cars wee target (google wee target) and he might be really excited to reveal Lightening McQueen. One of the things that excited Sarah with TTing was being able to wear Dorothy knickers (she went through a massive Dorothy stage). If Haz knows that using the toilet is a great way to get heaps of attention it may help when the new bubba arrives. Alternatively, you could strip him down, put sunscreen everywhere and let him loose in the backyard, and then pretend not to understand when he tells you he wants a nappy, he will eventually let it go in the garden.

When he is ready he will let you know. I am leaving it until Em lets me know. Sarah decided that she wanted to go on her own (Daycare told me she wanted to use the big girl toilet and asked me to pack knickers and extra changes of clothes) and for a while we insisted on a nappy in the car and a nappy for each sleep. We no longer use nappies in the car, and have never had an in-car accident, and I need to get more mattress protectors before I am willing to let her go nappy free for sleep times.