cod, tried that trick, didn't work, he ran round screaming "nappy on,nappy on, no nappy in potty, nappy on XXXX( his name)". he gets a nappy at night and poos in that before he goes to sleep. Am very but hoping he gets the runs and will have to go in a less controlled manner.
Ping pong balls down the loo, esp coloured ones worked a treat for his, ahem, "aim"