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12 in stock
Curbside Pickup Available or home delivery on in-town orders*

Recommended for ages 12 months and older

Bath time offers a unique opportunity for child development. 

The Tub Sub® floats as a boat and sinks as a sub! This interactive, transforming tub toy encourages cause-and-effect thinking and reasoning and teaches basic physics.

It has a flexible top and a plastic base with holes for windows. Push the flexible top part into the base to make the boat float; or pull the top part up and fill the bottom with water through the windows to make it sink like a sub with only the periscope above water. This fun bath toy is a great way to teach children about sinking and floating objects!


  • Why do things sink or float? Tub Sub® from Edushape® knows! As a boat, it floats; as a sub, it sinks.
  • Children can learn about buoyancy while having fun playing in the bathtub, swimming pool or wading pool.
  • Encourages early STEM learning – cause-and-effect thinking, logical reasoning and an introduction to early physics.
  • Toy is BPA- and phthalate-free.

PLEASE let us choose a color of Tub Sub® for you based on availability — yellow & teal or teal & orange. Tub Sub may be available in colors other than those shown in images.

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