I enjoy shopping at the Happy Owl even when I don't buy anything. (Is that shopping or browsing?) This is because it's such a cheerful shop. Located across from Lake Jackson in the Village Fountain plaza, Happy Owl has a huge variety of party and school supplies (especially for home schoolers).
They don't have a lot of things with a football theme, but they have more arriving soon. They have some no-frills centerpieces, clackers (she called them; I call them noisemakers), party picks (for cocktail wieners and pieces of cheese) and drink stirrers. The woman who helped me said they would be getting in some fancier cascading and honeycomb centerpieces as well as cutouts.
They also have some football shaped notepads you might be able to use as invitations or for making notes at the party. Say you're having a raffle or game and need something for people to write on. These notepads would be great for that.