I have 2 boys and train both of the in a matter of 2 weeks once i got started and this is how i did it

As they were only tiny babys in the bath I use to have a rubber ducky the ones that squeek

I 

use to fill it with water and have the potty in the bath with them as a bath toy we use to play a game called ducky do wee wee.

Then come time for toilet traing they knew that if ducky can do it so can they

trust me mums and dads it does work but you have to keep playin the game on a daily basis.