Oh man, those guys are awesomely hard. Def the hardest part when I was little, though I never beat it at that age.(5-8) I would say go in with full life and 2 potions, then just try and snipe them with the sword shot as long as you can. If you can get rid of a few that way it'll make it much easier to sneak up on the rest. And obviously save the potion for one heart left and then repeat. Do you have the blue ring?