Annabeth looked at the others who were wearing the ridiculous beach outfits. It was boring. She needed to do something to stir things. Maybe a beach ball? She opened her rucksack and found a gobstone. She smiled mischievously, it would work.

Secretly, Anna picked the gobstone, and then her wand and pointed it to the gobstone. "Engorgio!" As the small ball wasn't big enough, she cast the spell several times. When it was big enough, she cast another spell, "Pilaefors!" and the gobstone was transfigured into an old fashioned beach ball, similar to one she had seen on a picture. She grinned broadly.

"Professor, as I'm a Muggle in the beach, may I play while waiting for an interest thing to happen?" She began to throw the ball up and down, when a disturbing thought popped in her mind 'and if she hadn't cast the transfiguration charm properly? and if the amazing ball burst out like a stinky gobstone?', carefuly, she put the ball on the floor carefully. Perhaps someone else would want to play...
She looked around and joined the others in the beach outfits.