You can see a bunch of their products in their online catalogue:
http://www.hobbylobby.com/site3/catalog/catalog.cfm
It is pretty comprehensive and will give you a good idea what they carry.
If you are into altering, they have a great selection of wood letters in a few different sizes and styles, My fave are the largest (~10"?) which are thin, flat, and made from a masonite type material. They also carry the whole Cuttlebug line, Prismacolour pencil crayons both singly and in sets, a couple kinds of OMS, blending stumps from Taiwan and China, large sheets of foam core board, some clear stamp sets by Fontwerks, Pebbles shimmer chalks and stencils, those Souffle opaque gel pens in packs. . . .
When I was there last, they were in the process of taking down their aisles of Xmas stuff and replacing it with wind chimes, statues for your garden, mirror tiled balls with stands, mercury glass looking balls with stands (to set in your garden).
Back to crafting stuff, I just remembered they have a good selection of Cropper Hopper/Crop n Stor products like the vertical 12x12 paper storage that SU sells, drawers and boxes sized to hold their special (awesome!) ribbon cards and other things. Also, they carry some great paper packs like Bazzill Bling Sugar Daddy, Basic Gray Blush, Fruitcake, Dasher, a Wild Asparagus slab, DCWV pads like Far East in 12x12, 8x8, and Mat Stacks, and a few other companies' cool sets of PP that I just can't remember right now (Cosmo Cricket?? 7 Gypsies???). They also carry Heidi Grace, Queen and Co, Chatterbox chipboard, rubons by American Crafts and many other companies.... Distress Inks in a broader range of colours than Mikes carries, plus they also have Distress Embossing Powders. They have the Essential Glue Pad, full-sized Brilliance and Clearsnap chalk ink pads in a good range of colours . . . . They also carry a few of the small stamp sets by Hero Arts.
Sorry this is so long! I just tried to remember everything I'm tempted to put in my shopping basket every time I go to HL! HTH!