abracadabra _it's a triplet!
Took your advice and got a Piccolo on eBay. Even came in blue to match the bike. Took it out today (even though it was only 40°) and all went well, although it does take a little getting used to balance wise, especially starting. I spent a lot of time yelling at my second stoker to "quit squirming and pedal" (she likes to fool around by taking her feet of the pedals and sticking them out). All in all, though I think this will get us through the summer for some 10 mile bike-trail rides to the lake. It was quite a bit of work to turn the pedals over, especially going uphill, as the twin behind me is the lazier stoker. But what I wanted was a good workout while bringing my kids along right? Right! :-)