We have noticed that as B is getting older, his rituals are increasing so does his need for sameness.
When he was young at about 2, his main ritual was to do with lining up his sofa cushions in the morning, also watching the same dvd or lining stuff up, and of course what foods he ate (we had this from weaning).
When he was 3, he had the cushions one, and the 'he must be the one to prsee the buttons on tv and dvd', he soon developed his going to the loo routine after our potty-training breakthough, the leaving the house ritual appeared along with the getting in the car one, and the arriving at nursery ritual. He also became choosy with what clothes to wear, where to sit, what plate he should have.
Now he is 4, we still have all the above plus he will not accept anything that is not 'whole or perfect', such as petit filous pots must be still attached to each other when he eats them, rejects broken biscuits or half a slice of bread or cake, bananas must be totally unblemished... we also have stuff like PJs must always be matching, pants and vests too, socks as well, same with bedsheets, ex: he had dribbled onto his pillowcase so i changed it and he went ballistic so i had to change the whole duvet too, he has a specific way to put his coat on and shoes laces must be very equal (he always check!), he will only wipe his hands on the same coloured towels (the dark ones) and scream if i present a red one to him, he is unflexible on where he sits in the car which was a pain when my mum was here visiting as she couldn't fit in between the two car seats so we had to move his booster seat to the middle and he yelled all the way screaming 'seatbelt'!??, his train track set must be always set in the same way the way Dh does it with no full circles or hell breaks loose,...
Do you see what i mean? He is becoming more and more picky about more things, and is adding new rituals with each passing year.
Have you noticed the same with your dc?