Gobber: "Help! My chocolate is stuck in the bottle. I poured it in these bottles a few months back, and now I can't seem to get them back out. Maybe Heather can help. She's got her head on straight. Can you talk to her?"
1- Talk to Heather by the Lab
2- Collect chocolate from Fishlegs
Fishlegs: "Oh! I love eating my chocolate after Meatlug breathes fire on it. It melts all over the place!
3- Collect chocolate from Wartihog at the Lookout
Wartihog: "You need chocolate for Gobber? Sure! Don't eat it cold or you'll hurt your teeth. It's rock solid!"
4- Collect chocolate from Clueless at the Lookout
Clueless: "Huh? Chocolate? I think I have some around here somewhere. You can have it. It's a little sticky, since it's been in my warm pocket all day."
5- Collect chocolate from Speedifist at the Training Grounds
Speedifist: "You can have this chunk. Chocolate tastes so good! It just melts in your mouth."
Heather: "Bring the materials you've collected to the Lab. We'll use the information you gathered to make a hypothesis."
6- Choose you hypothesis
Heather: "Nice! Okay, let's get on with the experiment! Enter The Lab and tap on the apparatus to get started."
7- Heat up the chocolate
Heather: "You proved your hypothesis to be false. Raising or lowering temperature can change the state of chocolate, and the effects are reversible! I bet Gobber will be excited to find out."
8- Talk to Gobber in Berk
Gobber: "Time for me to get my delicious treat out of my bottle! This is a good day!"