Listen to last year's telling of Va'yakhel (and Pikudei) here!
B'nai Yisrael is ready to build the Mishkan under Moshe and Betzalel's guidance. First, they need to collect all of the valuable materials, which proves to be far easier than anyone expected - especially the Nesi'im. Next they need to do the hands on work of building the Mishkan but Betzalel reminds them that it's not just their hands that they need for this building project - it's their souls!