Colours and numbers

Bevan hasn't sussed out colour name matching yet. He gets them muddled up.
He is doing very well and consistantly with orange and purple - they must be
his favourites and quite distinctive.
I got him to tell me the numbers on an online colour blindness test this
morning and he aced it, so that isn't the problem <grin>
Lucky he recognises all his numbers from 0-9 now so he could tell me the
answers.

I wonder how I can explain the concept of ten being the digits 1 and 0. I'm
still working on numbers being read from left to right, so might need to get
that sussed first.
He can even count out objects. He was picking up pegs yesterday and got to
7 before they all fell out of his litle hand. And watching ducks the other
days he said " 2 ducks!" and then another group waddled over and he said "3
ducks!". I got hm to count them all together "1,2,3,4,5". When one waddled
off I got him to count to 4. Some basic addition and subtraction in real
life.