I thought Boeing might be sending you here. My bad.
There are several hobby stores, but mostly what I would call run-of-the-mill places. As mentioned above, the #1 rocketry shop is Science Education Center and it is not very far from McConnell or Boeing. Proprietor of the shop, Mark Logan, is a 1st class nice guy and in addition to rockets has a great line-up of telescopes in the store. Definitely worth a stop. There's a shop in the same strip mall that specializes in model railroading called Engine House Hobbies, and the Hobby Town on East Kellogg has an extensive section on RC cars, planes, and etc.
HTH, ---Lance.