Potty training toddler hides poo in his room

[tiptopteepe]

Im posting for advice because this is my first child and I dont have any experience of whether this is normal behaviour or not.

My son is 2 and a half and has just started potty training. He still wears nappies but has a potty which he will use sometimes when he feels like it to do a wee in. Hes very good at this but does sometimes still wee in his nappy. He wears a nappy all night and doesnt use the potty at all at night.
As for poo, he doesnt yet do poo in the potty but when hes done a poo he will either come and get me to change his nappy or he will go into the bathroom and take his nappy off, put the poo in the toilet and wipe his own bum and wash his hands then comes and gets me for a new nappy (i do also check that he has washed his hands and wiped his bum properly at this point)

However on occassion he has also been taking poo out of his nappy and putting places in his room.
I dont really know what to do about this. Its really gross because I randomly find it when I am cleaning and i sometimes have to throw a toy away because he has got poo ingrained in it and i cant clean it.
He does this about twice a week at the moment.
I just told him calmly that it was dirty and not to do it again the first time he did it and he seemed to understand and said 'okay mummy sorry' but the behaviour has continued.

Does anyone have experience of this? Is he doing it to be naughty or is there some other reason? Im not sure how to deal with it so any advice would be greatly appreciated.

Oh other info to add is that he does it in his room because thats the only place he is unsupervised. I just let him play in there whilst I do things round the house. He has the door open etc and i check on him regularly to bring him drinks and things. He stays in there of his own accord for hours some days because he has a large railway in there he likes to play with. Should I be encouraging him not to do that?

Thanks

[InDubiousBattle]

I've heard of dc getting upset when their poo is flushed away because, well it's their and they see it as losing something of theirs! My neice woukd take her nappy off and leave poo everywhere but in her case she was most certainly being (very!)naughty and she was told off and sanctioned etc. 2.5 is still pretty young but my dd (2.6)would certainly understand that leaving poo in her room is wrong.

As for playing alone, my ds used to be pretty content to be left to play at this age. He's just turned 4 and now needs a lot of playing with and I put from me so I'd be tempted to enjoy it whilst your ds is happy.

[InDubiousBattle]

Also, Pirate Pete has a Potty is a good potty training book.

[Hohofortherobbers]

Google poo goes to pooland! Good story to share with him.
I once read that some children get into a habit of EATING their poo, aways helps me to think of a worser case scenario