Use the hot glue to attach three acorns together, open side down. Glue another, smaller cap, open side up, in the middle of the first three. Once the glue cools, glue the grouped acorns to the middle of the star. Brush craft glue onto the tips of the acorns, and sprinkle with silver glitter. Insert a small candle, such as a chime candle, into the open acorn. If necessary, use some melted candle wax to hold it in place.