This here is a water shooter or some of you might call it a water blaster.
It works like a syringe whereby you will need to suck in water and followed by shooting the water out. However, unlike a syringe, this one is quite powerful in terms of the water pressure. But not as powerful to damage the human body or any other things around.
It’s made out of foam which makes it extremely light and fun to play with. It can also float on the water which makes it a good toy to bring when you’re heading to the beach or the swimming pool.