Ty saw a bunch of smaller girls playing together and making a nice sand castle... Well more like a fort. He could probably do all sorts of shenanigans with something like that... although for a 15 year old boy to go to some little girls would be... concerning to many people. So Ty then decided to will himself into a girl of their average age... whatever that was. Then felt himself shrink in most every place. His clothes also even changed to a one piece swimsuit. With a bucket and pail Ty approached the group of girls and asked "Hi... mind if I joined in your little sand kingdom?"
The girls looked among themselves and one said "Ugh sure, just be careful not to knock over any walls or anything ok?"
Ty nodded and then imagined what he could do with this little area of sand and the little girls.