Wash and thoroughly dry the strawberries and blueberries. Quarter the strawberries into bite‑sized pieces.
Thread ingredients onto each skewer in this repeating pattern:
One strawberry quarter (red)
One mini marshmallow (white)
One blueberry (blue)
Continue the pattern until the skewer is nearly full, leaving some space at the bottom to hold.
Arrange the skewers on a platter in a flag‑style layout or bundle them upright in a jar for a cheerful centerpiece.
Chill briefly if desired, then serve immediately.