Why do things sink or float? The Tub Sub will let you figure it out for yourself!
As a boat, it floats.
As a sub, it sinks.
For a floating boat, push the flexible blue piece down. For a sinking sub, pull the blue part up and fill the bottom with water. Only the periscope (also the handle) will stay above the water!
Encourage thinking and reasoning with this wonderfully fun and creative toy!
Ages: 1 year and up.
