Dragon bones?

I was collecting them at first, but they are fucking heavy xD. I couldnt figure out what to do with them and cant sell them.

You can make Dragon Armour with them, otherwise, you can just sell them.

"You collect them and make them into the Dragon Armour."

you can sell them to the alchemist vendor in dawnstar its an extra person to sell to if you already have sole to vendors all around skyrim and have a few left

If you have the smithing perk you can use the dragon bones to make heavy dragon armor and with scales you can make light dragon armor

the bones and scales are for dragon armor (to be able to smith it your smithing needs to be 100)to get there lvl 100 smithing) make a whole lot of iron daggers untill then sell'm (sell or toss them) p.s. i tried it i had dragon armor at lvl 7! now im a lvl 57 werewolf companion with power full weapons

you use them on the Smithing thing keep them dont drop them but if you run skyrim on a pc type in console: player.setav carryweight 1000 ;)

You should save them although it's not that important but it is needed for making dragon armor.