This has probably been covered before but I couldn't find it on a search...
Ds is 3y 4m and has been potty trained for about 3 months. He is very good with basically no accidents, day and night. But he still prefers the potty at home and at daycare, and will only use a toilet sitting if you hold him when we are out and the potty isn't an option (and only to wee). When do we start trying to teach him about weeing standing up? And is pooing on the toilet another tricky transition? I don't want to upset the apparent smoothness of things to date! Any advice or past experiences much appreciated!