The principles and benefits of "free competitive enterprise, properly regulated, unhampered by unwarranted interference" are explained in a variety of ways in this one-story steel and concrete building, sponsored by the American Economic Foundation. A theater in the round has a show on "bread and butter issues" and, for those who can spend the time, there is even an accredited graduate seminar in economics, given in two-week sessions, at the pavilion.

* Admission: free.

* Stage show takes 15 minutes; performances are continuous. 

Highlights 

ECONOMICS ON STAGE. The seats in an oval theater slowly swivel to follow a show called "Mr. Both Comes to Town," staged on sets that encircle the audience. An animated wire figure represents man's dilemma: as producer he wants higher wages for his work; as consumer he wants to buy goods at lower prices.

MONEY IN MOTION. In a three-dimensional, animated wall panel America's corporate economy comes to life. Polarized light makes money appear to flow through transparent tubes, to show how it is channeled into purchases, payrolls, taxes and profits, until the books are balanced.

TREE OF ECONOMIC LIFE. A symbolic revolving "tree" standing 12 feet high is designed to demonstrate the factors of economic growth: the natural resources that man taps, the jobs at which he works, the tools he uses and the goods he produces and buys.

THE ANSWER MACHINE. On giant panels, 120 basic economic questions are printed. When the visitor punches a numbered button on the wall panel, a machine prints out the answer.

ENTERPRISE ECONOMICS, B.A. 204-0. This is the title of a graduate seminar offered by Adelphi University's Business Institute and accredited by the State University of New York. Adelphi faculty members and distinguished outside economists lecture. Two or three credits toward an M.A. degree can be earned in the seminar, which is given in two-week periods of 30 classroom hours.