I don't know a single toddler who DIDN'T do that! I'd be really wary that if your daycare provider thinks that his is bad behaviour, I'd honestly be trying to find a new care provider because clearly they don't know much about toddlers! They do reach a point where they need privacy to do that - not so much with wee, but definitely poo. He's going to be 3 this year, so he's obviously becoming more aware of his toileting and when he needs to go. If he's not fussed about it just yet then there is no need to push the issue with him because it may just cause him angst and the it will put him off it altogether.