The ongoing trade war between Washington and Beijing is weighing on Chinese toy exporters.

Even though their products have yet to take a direct tariff hit, exhibitors at the Hong Kong Toys & Games Fair said the tariff battle and heightened tensions are still impacting their business.

They cited uncertainty, the impact of tariffs already placed on some electronics that go into increasingly sophisticated toys and supply chain headaches as U.S. and Chinese negotiators work to forge a deal before a mutually-agreed-upon reprieve on new levies ends in March.

The two countries are racing to reach an agreement and avert U.S. President Donald Trump's threat to increase the amount of existing tariffs and even expand them to virtually all of China's exports.

China dominates global toy manufacturing and some companies are Hong Kong-owned, a remnant of the days in decades past when the city was a thriving toy making center, though now most manufacture is on the mainland.

Johnny Sze, director and vice general manager at Hong Kong-based educational toy producer Eastcolight, said that buyers from the United States are increasingly eager to lock in orders ahead of time in case toys end up on the tariff list.

"This year we noticed that we actually have a lot more U.S. customers coming here, which is quite unexpected," Sze said Wednesday on CNBC's "Squawk Box," referring to the fair, which was slated to end Thursday.

Some at the event, which brought together more than 2,100 exhibitors from 42 countries and regions and is sponsored by the Hong Kong Trade Development Council, said the clash between the world's two largest economies has clearly hurt industry sentiment.