Got to laugh

DS - will be 5 next week is very into numbers (he has Asperger's and this is quite common). I asked him to do some writing with me this morning and sat him down and asked him to write "sun". Well about 15 minutes latter he comes back with a picture of school buses (with their appropriate numbers) and our cars as well as a whole bunch of addition & subtraction problems. Simple stuff like 9-2=7 and 5+4 =9. No-where did he write the word "sun". So tonight I asked him how to spell sun - he did it fine and then he said "spelling is boring, that's why I did math" - I sure hope his kindergarten teacher is understanding.