looking for a short/simple kind of app...

hi... i'm looking for a short/simple kind of app to allow me to play around with some different tbls.. basically.. i have a couple of tbls where i have a top level tbls, and a few subordinate child tbls parent child child i'd like to be able to add/modify/delete items from the various tbls.. i'd also like to be able to display a kind of breadcrumb across the top of the page allowing me to get back to the selected item/tbl... i'm willing to bet that there are numerous examples of this kind of app. i'm simply hoping that someone can point me to one that i can play around with... thanks -bruce