k so I think it was about a group of forest critters, and one day a truck crashes spilling toxic waste into the area and one of their friends gets sick so they all have to travel to find this plant to save him. I remember that the friends went through construction zones and they would call the equipment Yellow Dragons? Then they made this contraption and flew to the top of a tree to get this plant that their teacher said he could make a cure out of? Kind of random ahha, but if anyone knows title I'd appreciate it!

Once Upon A Forest