Formal: 棒棒糖 (bàng bàng táng) This is the most common and literal translation, meaning "stick stick candy."
Informal: 棒棒 (bàng bàng) This is a shortened version of the formal term, and is commonly used by children.
Other options:
* 舔舔糖 (tiǎn tiǎn táng): "lick lick candy"
* 棒糖 (bàng táng): "stick candy"
You can choose the one that best suits the situation.