Yesterday was our 10th anniversary of having moved into this house. And we've been parents for ten years (son is 10-3/4, daughters are 9-1/2). And I've recently been organizing the boxes of old photos stored in boxes in the guest closet.
Hence, the pictorial retrospective:

dressing up for Halloween
(at 21 months)

2001: Moving on to other farm animals,
3-year-old son was a sheep;
my little jack-o-lanterns went
trick-or-treating for the first time

2002: OK, I couldn't find a Halloween picture,
but this is close enough. It's one of my favorite
studio photos of my trio.

2003: Two little witches
and a black dog
2004: Jack-o-lantern redux
and a scary skeleton man!
2005: We had a mix this year --
a princess, Dora the Explorer,
and a scary race car driver
a princess, Dora the Explorer,
and a scary race car driver

2005: Another year of missing
Halloween photos, but another
fall photo I love nevertheless!
(I just love those smiles!)

2006: My son again used his creativity
to create a race car (this version
contained a built-in compartment
for holding candy), a fairy,
and a cow fairy
to create a race car (this version
contained a built-in compartment
for holding candy), a fairy,
and a cow fairy

2007: A bank robber in a vault,
the character Boots (from the show
Dora the Explorer), and a self-designed
orange furry dog with purple ears :)
I'm very much a visual person, so I particularly enjoy the pictorial retrospective. Not only do I love seeing the smiles on my children's faces, but I also love remembering how they've used their creativity, at times, to design their own costumes, or to pull together pieces of two or more costumes to make a unique combination. Childhood can be so full of creativity, even for those who don't consider themselves the artistic or creative type. Halloween provides a way for them to express a different side of themselves each year. In a few years, they will think it's childish to dress up like this... they won't remember how much joy it brings them!
But I will.