叩くと硬いのに乗ると液体。

Is this stuff a liquid or a solid?
Non-Newtonian fluid lets you punch, jump and walk on “water”#gigadgets #NonNewtonian #didyouknow #Facts #Physics pic.twitter.com/fEjE6cU3qz

— GiGadgets (@gigadgets_) April 29, 2020