little, young
big, older
The older kids had lessons in the afternoon as well.
He's like a big kid with all this enthusiasm.

cute, good, lovely (esp. BrE), nice
cool, smart (esp. AmE)
dumb (esp. AmE), stupid
normal
She was just a normal kid.

crazy, weird
Now what are you two crazy kids doing?

poor
I feel desperately sorry for the poor kid.

rich
a spoiled little rich kid

fat
I was the fat kid through most of my teenage years.

scrawny, skinny
a skinny little kid who looked to be no older than fourteen

local, neighbourhood/neighborhood (esp. AmE)
a gang of local kids

street
street kids who rely on their ingenuity to keep alive

foster
They had sixteen foster kids and two of their own.

college (esp. AmE), high-school (AmE), school (usually schoolkid)

bunch, couple, crowd, gang, group
They're just a bunch of kids.

have
We both wanted to have kids.

want
She had wanted more kids.

adopt, foster
They had adopted three kids.

bring up, raise (esp. AmE)
I've tried to bring my kids up to respect other people.

educate, teach
Here are some fun ways to teach your kids about healthy eating.

look after (esp. BrE), take care of, watch (esp. AmE)
She had offered to watch the kids many times so Toby could go out.

protect
legislation to protect kids from violence and harassment in their schools

just a kid, only a kid
He's only a kid. You can't expect him to understand what's going on.

like a kid
She was crying like a kid.

kids' stuff
The movie is pure kids' stuff from beginning to end.
That was kids' stuff compared with what lies ahead.

Kid is used with these nouns:
brother, sister