Abstract: A moisture sensor providing a visual and audio alert when a tree needs to be watered. The moisture sensor may be mounted onto Christmas trees to detect when water levels are low in the tree stand. The moisture sensor comprises a housing and a probe attached to the housing. The housing may be a Christmas-themed character. The moisture sensor includes a PC board within the housing for determining water levels in the tree stand and uses a LED indicator and speaker to indicate when water levels are below a threshold.