For every expectant father who’s ever wished they, too, could feel a fetus kicking their bladder, science now has an answer. Researchers in Japan have put together a suit packed with balloons, sensors, and warm water so you can feel what it’s like to be pregnant.

The suit, called Mommy Tummy, mimics kicking with a system of 45 balloons that inflate and deflate, and movement sensors and accelerometers pick up on the wearer’s activities, so the “fetus,” represented by a four-liter bag of warm water, can respond to exercise or sudden movements with redoubled kicking. Vibrating actuators produce the illusion of wiggling, as New Scientist describes:

When two vibrating sources placed a distance apart move at the same time, it triggers a sensation in between the two points. So by varying vibrating pairs over time, the simulated fetus seems to squirm.

And, in a cool but somewhat unrealistic move, the scientists have hooked the suit up to a screen, so you can watch a simulation of the fetus’ response while you stroke your stomach or walk around. For the thrill-seekers out there, a 9-month pregnancy can be recapitulated in two minutes, or it can be spread out over a longer period for a ...