2 sentences for 兑换 (duì​huàn — exchange)

1. 我用积分兑换了一个可爱的毛绒玩具。

   wǒ yòng jī​fēn duì​huàn le yī gè kě'ài de máo​róng wán​jù.

   I redeemed my points for a cute plush toy.

   Source: Dong Chinese Dictionary

2. 只要经常在这里买东西，就能用积分兑换奖品。

   zhǐ​yào jīng​cháng zài zhè​lǐ mǎi dōng​xi, jiù néng yòng jī​fēn duì​huàn jiǎng​pǐn.

   As long as you shop here frequently, you can redeem points for prizes.

   Source: Dong Chinese Dictionary