Wow! Maybe you have a future fashio designer on your hands there! My dd was always putting stuff on...we called her "Steven Tyler" (from Aerosmith) because she'd put leg warmers on her arms, 2 of my bras around her neck, a baseball cap with a ski hat on top, and socks on her hands...all at once!
Little bag-lady!
My first thought with your dd is a tu-tu type of thing...dd got one for her 2nd birthday, and it is so simple to just pull on over her clothes...she had sooooo much fun with it! I might get her one, and some beads to put on, kwim? Dress-up type stuff that is simple to pull on...fireman jacket, cowboy hat, whatever! she'd love it!