I put together an age-appropriate look that Heidi could take from daytime to nighttime.
FROM DAY TO NIGHT
Black Faux-Wrap Dress, $17.99This photo doesn't do the dress justice - I own it and it's fabulous. It's a bit low-cut, though, but we'll get to that!

FOR DAYTIME
Simple White Tank, $3.80
To wear under the dress during the day. At night, take it off, baby!

Flip-Flops, $3.50
You can't go wrong with flip-flops for daytime. They come in a ton of colors. I personally would go with the bright pink or teal, but black works just fine as well.

Striped Canvas Handbag, $20.80
This is adorable and big enough to hold your guidebooks (and casino winnings).

FOR NIGHTTIME
This will dress up and class up the simple LBD for nighttime, when it's a bit cooler.

Red Peep-Toe Heels, $15.99
These will inject a bit of color into a basically neutral outfit, and they're so cute!

Black Patent Hobo, $14.99
This is simple and adorable.

Metal Embossed Earrings, $8
I chose these for nighttime but they're casual enough to wear during the day as well.

GRAND TOTAL $96.56