what toys are appropriate for each child age that will make them smart?

Answer 1

Books. Children learn so much from books.
Also music softly constantly playing in the background can help stimulate their senses.

Focus more on toys that help their eye-hand co-ordination, and basic strategy building toys. As the person above mentioned Lego, or if they are younger, building blocks.
Have different blocks in different shapes and colours.

One thing my mother did with me when I was younger (and I realise this isnt possible with everyone), was I had a separate room for playing, and a separate room for sleeping. Therefore I had no toys in my bedroom. So by not having toys in the same room as I slept or studied, I wasnt tempted to play, and didnt lose concentration easily.

I have a friend who could read at the age of 3, and her brother was 2 (reading the newspaper at 3), now he is a successful lawyer, and she has a forensic sciences degree, both are multi lingual. This was partly through their mother constantly reading to them, and introducing it to them at a very young age, teaching them the alphabet, and introducing languages to them.

Answer 2

Lego and you may by some other toys that simulates the minds . Creative and constructive that the don't put in there mouth . I would suggest the ages of the child over 3 yrs. that goes for a boy just as well as a girl. I know thats when I noticed our son was more curious about his enviornment so we got him into it.