I'm probably posting in the wrong place, as I am really not sure whether this is anything especially unusual, but here goes...
My DS is 25 months. He can count (the highest I heard him count was up to 34) and understands the concept of counting; for example, if I give him 6 grapes and ask him how many, he will count them with his finger and give me the correct answer. He recognises numbers up to ten, and is beginning to recognise double figure numbers beyond that. He recognises all the letters (both big and small), including the letter names and the sounds of each letter. He started recognising letters at around 15 months or so - it started with 's' and 'm' and went from there really. He can recognise a handful of words (whole word recognition) but also seems to be 'getting' the concept of reading, in that he appears to understand that sounds run together make words. He hugely enjoys me making a word for him with wooden lettings, and gets very excited when he is able to decipher a word. This will usually be prompted in the sense that I ask him to sound out the letter sounds of each word, which he does correctly, and then we sound them out again in a row, and he is often able to run them together and get a word (at which point he is overjoyed, running his finger along the word and happily saying "This word says cat!").
He has known colours for about 12 months now, but in the last few months differentiates between light and dark colours, e.g. dark green and light blue. In the last few days, he's really enjoyed me doing addition using my fingers as guidance (e.g. 2 plus 1 = 3). When asked today on a whim, he was able to correctly give me the answers of the following sums: 2 + 1, 1 + 1, 5 + 1, and 2 + 2.
He knows all his shapes, including some more unusual ones like parallelogram, semi-circle and trapezium. He likes the fact that shapes can be put together to make a different shape. For instance, today he put together two apple semi-circles and said "two semi-circles makes a circle". He also seems quite imaginative, saying things like "Mummy's mole is a bit like a bubble" (thanks DS!) and that my tied shoelace looked a "bit like a dragonfly" (it had fallen in the shape of a dragonfly). He is able to do pretend play, like cooking/pouring tea, and also likes to pretend he himself is something, usually a car. I use this method to speed him up when walking, by encouraging him to pretend to be a racing car and go really fast.
He started talking pretty early and he has been speaking in full sentences for a while now, although he struggles with pronouns, often saying things like "you bumped your head" or "you want to go and play trains" when he means himself. He is beginning to use "I", "me" and "my" a bit more now, and always does so if reminded.
He is not obsessed by anything, but enjoys doing puzzles. He happily does unfamiliar 25 piece puzzles all by himself with no help from me, and he can do a 50 piece that he is more familiar with. Larger puzzles he still likes, but wants help with. He adores cars, trains and diggers, but seems to have a general interest in most things - lately he has been enjoying learning the names of different flowers, such as dandelions, daisies, pansies, roses etc, and likes pointing them out when we are out and about.
From a physical perspective, he started walking at 11 months but didn't start running properly until a good 7 months after that. He's still not as physical as some of his peers and still falls over a good deal. When he runs in wide open spaces, he has a tendency to run with arms flailing, his balance all over the place. In small spaces, however, his balance seems really good (he loves the balance bars in playgrounds). I've been working hard to take him out a lot to the park and soft play to build up his core strength a bit, which seems to be helping.
He's very, very loving and adores cuddles and kisses. His sleeping has never been great and he still co-sleeps. He gets terribly upset by people being sad - in real life, books, TV, you name it. Every time he watches Thomas, and Thomas or one of the other engines inevitably gets sad about something, DS gets a bit upset and says "make Thomas happy again!". Today when DS hit me (he is going through a hitting phase) I had a sad face on, and he got terribly upset and after saying sorry, he tried to pull the corners of my mouth into a smile. He has taken to giving other children and adults big cheesy gurns smiles, because about a week ago I told him that smiling makes other people happy. Prior to this, he has not been massively social, preferring to play alongside (albeit closely) rather than with other children.
Do any of these things point to anything I should be worried about, like Asperger's? I have been hesitant to post, because every time somebody posts something like this, there are always replies suggesting something might be wrong. Is it possible to tell if a child has Asperger's at this point? Are there any signs I should look out for? Sorry for the long post.