(CNN) A T-shirt inspired by a young Tennessee Volunteer fan, who was bullied for his homemade design, is selling wildly after news of the boy's creativity and team spirit went viral.

The campus bookstore has gotten more than 16,000 pre-orders for the "College Colors" shirt since it started selling them last week , University of Tennessee Director of Media Relations Tyra E. Haag said in a statement. Demand was so high that the store's website crashed over the weekend.

The university is not profiting from the $14.99 shirts, Haag said. It costs $7.50 per shirt to print and the rest of the money will be donated to the charity Stomp Out Bullying , Haag said.

The shirt was designed by a Florida elementary student, who loves Tennessee football , but didn't have a shirt to wear for his school's college colors day. The boy drew his own version of the UT logo on a piece of paper and pinned it to an orange T-shirt.

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