He seems very bright as we've been told by several people he's probably gifted and talented, but I don't have any experience in this area. A few of the things he does.......
Reading - Oxford Reading Tree Stage 9/10.
Read and teaches himself Science from a DK Science Dictionary
Science - Loves learning about blood and the imune system
Knows over 200 human bones, by their medical name (eg Femur, not thigh bone)
Maths - Knows 1s 2s and 3s times tables, part of 4s also.
Follows instruction very well (he's been attending Hocky training and the coach thought he was 6 or 7 because of this) and has a long attention span - for example, he watched a whole episode (1 hour) of the Human Body the other day, then went to tell Mummy all about how macrophages protect the lungs - he was very detailed and exactly right in his explanation.