T.H.
I wouldn't really do any activities. I would just make sure you have lots of toys available! I started doing activities at the 2nd b-day party and even then it was hard. If you really want something I would go with tattoos, those are always a hit! You can put out sponges and little bowls of water and then you don't have to really monitor it too much. Most parents will help their kids. Other than that I would try and do something that goes with your theme. Maybe you can find some of those foam crafts that come in kits or just simply put out those foam stickers and some paper. Most kids like that stuff. If you don't have a theme for the party you could always put out some Valentine's stuff for crafts. Bubbles was also a great idea, along with sidewalk chalk. Not sure what winter looks like in Dallas, but those are always great activities!