If you have access to a forest this one is cool.
Go out to the forest
and assist your child in building a home for the faeryfolk there. Don't
use two-by-fours but branches instead. Make it as elaborate as you wish.
Tell your children that sometimes the faeryfolk take on the form of
animals and will move into the home you've built for them. To lure them
into the home put a variety of fruits and vegetables inside and a note to
them stating that you've built this home for them and if they wish they
can grant you your wishes. When the winter snows start piling up
they will be very happy you've built them a home and stocked it with food.
They may feel grateful enough to grant you your wishes.