Our 34 month old has recently started lining-up his toys, they don't seem to be in any particular order, other than the cars are grouped together and the figures are grouped together. If you take one of the toys out of the line and start to play with it, he gets upset. He lines up fruit also, but when he does he sings along a song about counting apples!
To put this in conext, he's been off nursery with chickenpox and the cold, so his routine is out of sync, plus he's been in the house more.
I know that lining-up can be an autism red-flag, but I have also read that nearly all children do this at some point and it is part of the 'positioning schema' which is part of their development. He's never really done it before and I had wondered about the autism thing as he gets upset if you pull something out of line. The line tends to differ each time though.
Otherwise, he sleeps well, eats well, seems OK with changes to routine and the nursery haven't flagged anything up. Eye contact is good, he's asking "what's that" a lot and he points. He points more now than he used to!
Any thoughts?