A "potato tower" - grow potatoes in a vertical space, save your garden space. Kids should think this is pretty interesting too.
the classic veg plot
Grow mustard as a cover crop and mulch.“The advantage of sowing mustard are that it disinfects and regenerates the soil, it stimulates the life of the soil and curbs nematodes, especially potato root eelworm..."
Companion Planting: Plant this alongside that for a better garden.
Jumbo Potato Grow Bag | Buy from Gardener's Supply 2 for $20.00
Gardening Tomatoes Organically – The Guide (hey, they didn't add "maimed by lawn mower to this handy guide...)
Veggie trellising ideas from Longwood Gardens - Fine Gardening
Cute garden idea!