This Houston outdoor museum gets a C for, oh, creative. Its paths are lined with exhibits in praise of the big O and sculptures made of such objects as tractor seats and pipe fittings. Overhead, whirligigs creak and iron birds sit in the breeze. (This isn’t just an orange show; the loop-the-loop tone counts too.) Jeff McKissack, a postal worker, created the museum. He died in 1979 at age 76, certain the presumed powers of his favorite fruit would let him live to be 100.