one thing that I have struggled with for the last 6 years, is getting my DS to sleep. He says there are too many things going on in his head, and counts/does sums or reads under the covers in bed. I just had to take away his reading book (an hour after putting him to bed) so he is doing speed/distance calculations in his head instead (as you do!)
I sympathise with him, I had the same problem as a child. Unfortunately it isn't a habit I could kick.
Anyone else have any experience of this and any solutions? I know their brains are going 100mph but it's TIME FOR BED! We have tried child meditation, etc with mixed results. My DS is exhausted but his poor brain is still revved up...