For the boy, the best fit is for young kids, Conan Edogawa from Case Closed/Detective Conan. I know someone who was him when they were younger. There is also the new character, "Oliver" from Studio Ghibli/Level 5's new PS3 game, Ninokuni. Son Goku from Saiyuki could be pretty fun if you want to stretch it a bit more price-wise.
The girl has been given enough I suppose. Guess that's there to add more options for the boy.
Also TC, how would you feel about crossplay for them? I am sure the boy would be against it, but how about the girl?
Cosplay 1: Sailor Venus (Commissioner failed to make 4 month deadline)
Update: August 10th.... still nothing.
Reality: Recycled or no cosplay at all. Got to love commissioning! Thanks everyone!! Serious thanks to Dulcinea, who actually made the deadline for the accessories far in advance and of outstanding quality. Sucks they won't be used.