At the party we had our son's favorite meal: macaroni and cheese with pureed squash and served chocolate cake with homemade blueberry frosting (for a nice purple color without mystery colorants). To make it into a crayon I made two small sheet cakes and set them end to end. Two diagonal cuts at the top made the crayon tip (and a nice pre-party snack). Once the cake was frosted I used black sugar to make a crayon design to complete the look.
For favors I used brightly colored favor boxes filled with dime store coloring books, a few washable crayons, stickers, and a package of toddler gummy snacks.
So hardly anyone colored, and the birthday boy was frightened of the bubble machine I got him, but all in all I'd say the party was a success!