Activities for my almost 3 year old?

[Cassius2]

circus skills! we are putting DD in when she turns 3 (they have to be 3...so might not be appropriate now for your DS, but maybe check...).

[Astrid]

There is a kinder gym at the showgrounds and I think another one at the indoor tennis centre. The people at the showground one seem quite nice and they had lots of different sessions during the week with no requirement to book for a whole semester (well that was last year, I assume they are still the same).

[Muffy]

Thanks for all the suggestions.
I have enrolled DS into swimming lessons