I do not have any Genesis or Generation 4 dolls, but I would think these items would be helpful:

For children:

• Halloween costumes (cute, home-made and not slick store bought)

• • A nice witch costume: http://0.tqn.com/d/childparenting/1/0/0/0/-/-/About_witch_edit.JPG
• • A cute hobo: http://creatingreallyawesomefreethings.com/wp-content/uploads/2012/05/coolest-homeless-child-costume-2-215582681.jpg

• Rain gear (fisherman's hat, poncho, boots, umbrella with wet and dry MATS/Textures)

• • A collection like this: http://www.lil-miss.com/wp-content/uploads/2011/03/raingear1.jpg

I will probably think of more later.