GIVE ANSWERS - Русский язык

Если этот вопрос обращен к кому-либо, то он должен звучать так: "Не хотели бы вы покурить травки"? или "Хочешь покурить травку"?
Курить травкУ

to smoke = курить.
to be smoking = курить.
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smokes = курит.
is smoking = курит.
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травка is a noun, and nouns in russian have different endings (depending on the position they take in sentences and their relation to other parts of speech).
Compare to flexible pronouns in English:
I - me - myself; he - him; they - them, etc.
You say: He smokes him.
The pronoun denoting the agent of the action takes one form, one ending. And the pronoun denoting the object being effected takes another form, another ending.
Depending on the type of effection they get, nouns take differents endings. They are divided into 6 groups - so-called Grammatical Cases of Nouns.
(and pronouns, and adjectives, and some other parts of speech.)
Here, with the verb 'курит' the form 'травку' should be used.
If the writing on the snowboard should inform about the owner that he "smokes cannabis", then use "курит травку"

if you want to say about yourself then "курю травку". It is correct. it would mean I smoke