All year, Hillel builds houses... treehouses, forts, and hideaways. But he can't seem to find the right holiday for one of his houses until fall comes, and with it the holiday of Sukkot.All year, Hillel builds houses... treehouses, forts, and hideaways. But he can't seem to find the right holiday for one of his houses until fall comes, and with it the holiday of Sukkot.