The centers would be designed around a common theme. Design ten centers that illustrate the concepts learned in the unit. Use manipulatives such as spinners, dice, cards. The computers can be additional centers that could have an Internet site that uses the same theme. Have directions for various types of poetry at each center.
Students can rotate from center to center, creating a poem as they go around.
The computers could be used as word processing centers for the poems, for a class book, where each student contributes one poem, or an Internet site that has poetry for students to read. Before going on the field trip, assess what outcomes you hope students to come home with. Create a book, a slideshow, or a webpage to share the trip.