Small frog statues, each with their own little plate, each with their own food, except one. Simply add the missing food, and voila! One korok seed.
Protip: afterwards, you can take all food items for free!
CHAPTER EIGHT: FLOWER TRAILS
You may have noticed one of these small, yellow flowers already. They disappear when you touch them. Don't fret though, a new one will pop up nearby in a second or two. Touch that one, and the next, and so on, and eventually there will be a white flower. That's the last one. Touch it, and voila! One korok seed!
CHAPTER NINE: ARCHERY
These little tests are marked by a tiny wind vane. Step up close, and one or more balloons will appear, moving more often than not. Shoot each one with an arrow, and voila! One korok seed! Be warned though, these balloon shooting ranges are not the only archery koroks. Sometimes, you'll want to shoot at suspiciously placed apples, acorns stuck in hollow trees, or anything that looks strange.
CHAPTER TEN: BOULDERS
If there's one or a few boulders just sitting there for no reason, it's usually a korok hiding spot, and there'll be a hole nearby. Use any means necessary to get the boulder in the hole, and voila! One korok seed. You'll also run into ball-and-chain situations, you can simply magnesis those into their tree stump holes.
CHAPTER ELEVEN: TREE PATTERNS
In your travels, you will run across a lot of fruit trees, usually apple trees, but cacti can grow fruit, too! Sometimes, three identical ones will be growing in a row! Well, nearly identical. One of them will have more fruits than the other. Remove the excess fruits, and only those, until all trees are exactly the same, and voila! One korok seed!
Thank you for your attention. There's nine hundred of the little shits, but you need only 441 for all inventory upgrades.