One of the true highlights of our family reunion for the kids and adults alike was the dessert longer than an SUV.
The 10' banana split is very easy to do. You can either get a length of PVC pipe and jigsaw cut it in half (think of it, you could tape the two together and leave me in the dust with a TWENTY foot banana split!) Or just buy a length of gutter and save yourself the cutting.
Line with tin foil
call in the troops, hand out spoons and step back. (or elbow your way in.)
When in doubt, serve a huge dessert. Pearls, people, pearls of wisdom. Cherish them.
"Oh, aunt Jen, you're such a nerd."