The Joker's eyes gleam with mischief as he carefully places the potion on the sand. "This will be quite the surprise," he chuckles, disappearing into the night.

Little Alex giggles, building sandcastles, not noticing the subtle shimmer in the sand beneath him.

Batgirl quickly scans the area, her eyes widening as she spots Alex. "Stay away from the sand, Alex!" she calls out urgently.

Batgirl narrows her eyes, spotting the Joker watching the chaos. "You won't get away this time," she vows, launching her grapple to pursue him.

Batgirl focuses intently, mixing ingredients. "I need to reverse this before it's too late," she mutters, determination etched on her face.

Batgirl watches as Alex runs to her, safe and sound. "Thank you, Batgirl!" he exclaims, hugging her tightly.