Crappy parenting: a.k.a: has anyone seen my patience?

So, I did my afternoon shift. We went to Lowe's where it was a knock-down, drag-out battle over lumber. Yes. I said lumber. I needed to go there to find a wall-bracket for the flat panel TV that he got for Christmas (yeah, I know, he really doesn't watch TV- but I hope!!!) and in order to accomplish what I set out to do, there is always some give and take. I give him the opportunity to look around at all the gadgets and doo-dads, and I take away my sanity! (well, sometimes). So, he wanted to look at lumber. Okay... seems reasonable. Well, then it became a search for the perfect lumber to build a canoe- no, a motor-boat, no- a paddleboat. Okay- so in my world of bad parenting I figure I can relent and buy a few pieces of lumber to keep him occupied in the garage with the tool kit from santa, then maybe- just maybe, I can have the chance to relax for a little while. Now, keep in mind that I have the prius which is NOT designed for lumber hauling, yet he is INSISTENT that we buy these 9ft long 2x2's or 2x4's or whatever the heck they are. Now I am starting to feel it all slip away from me... I try reasoning with him: "how will we get these home", and "don't these smaller pieces seem better?" And finally, "how on EARTH do you expect to build a boat out of THAT?" As it turns out, there is an answer for all of these comments. (important point: learning disabled does NOT equate with stupidity!) As it turns out we get the lumber home by renting the truck that Lowe's has available, (duh!) the smaller pieces of wood won't enable him to build a boat to accomodate the entire family, (he is a considerate child) and as it turns out I am crushing his self-esteem by not believing that he can, INDEED build a boat out of that wood, 'cuz he knows how and I just don't believe it. (okay, crappy parent!) Well, all that aside I am happy to report that the reasonable parent won that battle and we left Lowe's not with lumber, but with several stick-on reflectors that subsequently wound up on my husband's tractor and in various other locale that I have yet to discover. A victory? Well, I don't know... parenting IS a relative and subjective skill. Oh, and p.s. I also made it in and out of Walmart with my groceries... and a set of play hand-cuffs... a pretzel from Auntie Anne's.... and finally: my sanity.