Welcome to the last hub level of the game! Right before you enter, you see a cutscene of Grendor. It's hard to believe fairies can be frozen in this weather, but that's something for another time. Time to get to work!
Fairy 1 (Glinda)
Your first order of business here is to get some fairies. From where you enter the level, move up until you hit the tree near the stream. Now go to the right, burning the mushrooms in your path. Stop when you get to the ledge, and start going up again, now charging so you break the vase in the way. When you reach the castle-like area, start moving to the left, going up at times so you don't go off the edge. Stop when you get near the Star Park portal. Go up again, and start climbing up the hill, going left while doing so. You should now be near Dragonfly X. Move down now, and then left. The fairy Glinda should be there. Thaw her out, and you've now knocked down one fairy from what you need.
Fairy 2 (Penny)
You know the area where Glinda was rescued? To rescue this fairy, you just need to travel a short distance from there. Jump off the hill, and keep going lower until you're about at the same elevation as the stream and you'll see Penny. Thaw her out, and that's your second fairy.
Fairy 3 (Merritt)
Remember the ledge from when rescuing Glinda? Well instead of avoiding it, you're jumping down it. Where the path opens, go right until you hit the castles. Now, go up until the path opens again. Go right to the tree, and go up again. When you hit the next tree, there will be Dusty Trails and the fairy Merritt. Thaw her out, and you'll get your third fairy.
Fairy 4 can be right above Grendor's Lair.
Fairy 5 (Mellie)
If you've managed to fully burn every mushroom, you'll get Mellie. Thaw her out to get the final fairy.
Star Park is found in the top left area. You can already access it.
Remember the ledge from when rescuing Glinda? Well instead of avoiding it, you're jumping down it. Where the path opens, go right until you hit the castles. Now, go up until the path opens again. Go right to the tree, and go up again. When you hit the next tree, there will be Dusty Trails and the fairy Merritt. You'll need 75 fairies to access it.
Dragonfly X can be found near where Glinda is rescued. You need every fairy from the game, including the one from Grendor's lair, to access it.
To find this level from where Penny is, climb up so you're at the level of the stream coming from the tree. Move right until a small ledge can be found. Now go up, and you'll find Moneybags. Give him 1,000 gems, and you can now access this area.
Grendor's Lair can be found in the top left area of the Summer Fairy Home. You'll need 99 fairies to access it.