Hi, Can I buy tickets directly there? and what value would be for an adult and a child under 9 years

Of course you can buy them, but it would be better on the Disney website and sometimes you get them with discounts

If you can buy on the site but it is better to buy at the walmart to avoid rows

Children pay the same value as adults.

If the tickets you buy on the spot at this moment are 130 us porq are in the spring break, each one has that value