A boy joins a performance with a band during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)

Children enjoy the slide during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)

An artist balances rocks during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)

People visit a military display during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)

People enjoy the sky ride with the Canadian National Tower as bacground during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)

An artist works on a sand sculpture during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)

A band performs during the 2012 Canadian National Exhibition in Toronto, Canada, Aug. 17, 2012. Founded in 1879, the Canadian National Exhibition is one of the largest fair in Canada. This year's event started on Aug. 17 and will last 18 days. (Xinhua/Zou Zheng)