In the book "The Giver" what do the kids receive at the age of 5 and 6?

I can answer this question negatively or positively.  I'll start with the negative answer.  

At at age four, the children are given jackets that button up and down on the back.  Those jackets are meant to teach interdependence.  A person cannot button up and zip down their jacket without the help of another member of society.  At age 5 and 6, the children do not get anything new.  They have to keep wearing the jackets.  At age seven, the kids are given jackets that button in the front. Maybe at 5 and 6, the kids are given newer jackets to account for their growth, but the item itself isn't different.  It's just a bigger jacket.  

To put it positively, when the kids turn five and six, they get to keep wearing those jackets! 

Fours, Fives, and Sixes all wore jackets that fastened down the back so that they would have to help each other dress and would learn interdependence.