1- Deliver 2 black wool fleeces to Hiccup
2- Collect metal nuts and bolts from Gobber
Gobber: "Hiccup's making a saddle? I hope he'll be able to do better than I did! These nuts and bolts should fit Hiccup's needs. Here you go, and wish him luck!"
3- Collect leather straps from Johann in Berk
Johann the Trader: "Why, I have just the thing! I'll give you these leather straps crafted by the finest tanner in the east. Legend says it came from the hide of a hammerhead yak. It should be more than sufficient for your needs!"
4- Collect oil from Phlegma at the Lookout
Phlegma: "You want to soften leather? I have just the thing! I bought some coconut oil from Trader Johann last summer. That will soften the leather and make it smell great, too!"
5- Collect leather from Snotlout
Snotlout: "You can have my old blanket. It helped me become the tough, gorgeous warrior I am today but I outgrew it years ago. Um ... be really gentle with my blanky!"
Hiccup: "These pieces by themselves don't seem like much, but putting them together makes them amazing. Please bring them back to me."
6- Deliver the saddle parts to Hiccup
7- Play Fireball Frenzy with Snotlout
Snotlout: "Hey, [Your Viking's Name], I'm glad you swung by! I need to get my competitive blood pumping to get rocking again!
Hiccup: "Eureka! The saddles are ready and they are amazing! Dragons fly much faster when they feel comfortable, so they love these saddles!
8- Buy a saddle in Johann’s trading post
9- Fly to the top of the mountain in the Wilderness
Hiccup: "It seems to be a pretty good fit. Thank you [Your Viking's Name], these saddles should be a big hit and I couldn't have created them without your help!"