Magic Keys 1000 Piece Puzzle

What mischief do you suppose the pixies are up to?  Seems to be that they have spread some magical keys about.  See if you can place them in their proper spots in the 1000 piece Magic Keys puzzle. It features a landscape with birds, butterflies, clocks and more in front of a many branched tree. You'll have to use your imagination to determine what the keys unlock. It is part of the Pixie Dust series with artwork by Ilona Reny. The Magic Keys puzzle is made by Heye and measures 50 x 70 cm. Made in Germany and released in 2020.

Please see the other Pixie Dust puzzle, Fairy Park.