In administrative language, there is óvodapedagógus, and in informal language you might hear óvóbácsi.
"I know here good kindergarten teachers" should be valid as well, shouldn't it?
It's nonstandard English. Usually you go in this order: subject-verb-object-place-time.
Attributive adjectives (the adjectives that are right in front of the noun they describe) always stay in their base form. Only the noun gets suffixes.
- Ezek zöld házak. - These are green houses.
- Ezek a házak zöldek. - These houses are green.
- Szép embereket látok. - I see beautiful people.
- Szépeket látok. - I see beautiful ones.