how to say drum in polish?

okay so i am a little confused about this because two of my friends told me different things. i wrote this to them:

gram na bębnom,

my friend monica understood it, but next period, i showed it to my friend bart, who started laughing, and said it should be:

gram na bębonki (or something that sounded like that)

i was really confused, and i still am, so could you guys give me some in sight on this?

1.gram na bębnach or 2.gram na bębenkach - these two sentences are correct,

drum = bęben
small drum = bębenek
drum kit = perkusja (or more formally 'zestaw perkusyjny')

so the sentences could be:
Gram na bębnie (pl. bębnach)
Gram na bębenku (pl. bębenkach)
Gram na perkusji.

Cinek

gram na bębnie [~~bembnie]: gram na bębenku [bembenku]

I bet this guy is clear as feck now

But this is fun!

I taką sobie myśl wyodrębnię,
Że ja ma bęben i na nim bębnię,
Więc sobie w końcu to umożebnię,
aby pobębnić na zamku w Dębnie.

• 
  Dêbno Castle
  

good one!