See Jack and his cousin Izzy have fun on the trampoline.
See Jack pound away on the piano.
It was pretty crazy (and loud!) when his cousin's joined in on the fun.
See Jack practice running into the water at the lake.
See Jack and Levi having fun throwing sand and splashing in the water at the lake.
They both think it is hilarious to throw things.
See Jack watch while cousin Levi practices "swimming."