This book has patterns that are all knit stitch.
The Knitting Experience Book 1- The Knit Stitch
You could use this pattern to make a scarf, dishcloth, placemat, etc..
Garter Stitch cloth
Garter Stitch Shawl
Garter Stitch baby cardigan
Garter Stitch bear
Garter Stitch top
Many of these will have increases and decreases for shaping. If you truly want to do nothing but knit then you'll have to stick to scarves, dishcloths, and things that don't need shaping.