In the picnic levels 2 and 3, there is a secret cave. Do you know that log on a rock in the back of the area where you can go to Abras shop? It looks just like an area with no grass, with grass at the very top. Go up the dirt mound. Don't let the grass intimidate you. You can walk right through it.
In the level 2, there will only be a screw and a magnet. But in level three, if you're having a hard time finding an ingredient, go into the same cave the same way. This time there will be an ingredient as well as a magnet and screw.