He can understand an idea of fractions and he can make 1 by many ways.
Also which is bigger 1/2 or 1/3 etc.
These days he plays with this fraction toy.
I think it is a good opportunity to teach him higher level of this.
So I tell him reduction of fractions to a common denominator.
Of cause we use this toy because he is good at understanding visually.
He does well more than I expected.
I feel happy to see his smile.
He just enjoys getting a new way to calculate.