You can put the book Chicka Chicka Boom Boom in the science center..and then put a coconut (regular) next to it for the children to use their senses to explore (shake it, smell it, listen to it, feel it, look at it..hear, and eventually taste whats inside).
You can also add shredded coconut, books about coconuts as well as foods that are made from coconuts (coconut shrimp, macaroons, etc). also put magnifying glasses in the center..so kids can look at it up close!
You can ask the children who has had coconut, what they know about them, etc.
you can also do the book...chicka chicka 1, 2, 3 (and do an apple taste test, etc). put different types of apples in the science area...and then have the children explore them. you can put them in a water table and see which ones float, etc. make star prints, plant the seeds (they really work), etc.