For my son, age 10:
First started sounding out/reading words around 2. By 2 1/2 I could spell words for him and he could name the words. He also liked to spell words for me.
Read his first easy reader book at 2 1/2 and Magic Tree House books at 3 1/2.
He was able to read paragraphs from Alice in Wonderland at 4 1/2 but only with a finger underneath the words and for short periods of time before his eyes got tired but he could continue naming the words if I spelled the words out for him while he looked away. Vision therapy several years later helped with this.
Age at which he could count a group of up to 10 objects and draw a line to the corresponding digit was around 3 when we bought him a Kindergarten workbook, but he preferred doing First Grade Reader Rabbit at that age because he had some visual motor integration problems.
I don't know when he first started doing addition in his head, but I think it was before he turned four.
He could do some multiplication before he turned 5.
He could only write his name before he turned 5 and his handwriting was sloppy and he wouldn't color in the lines. He has motor dyspraxia which makes these things more difficult for him. He could spell really well but his handwriting was very slow and he couldn't write for very long before his hands got tired. For this reason and the fact that he has a May birthday, the Kindergarten teacher wanted to hold him back in a transitional first grade and we had no real choice but to homeschool.
