If you’re the type to shake your leg while sitting, or have other fidgeting habits while sitting idle, you’re in luck. It’s no new method, that of taking restless or otherwise wasted energy and turning it into electricity, but this new research takes it a step (or shall I say shake) further.

Dutch designer Nathalie Teugels has sought out a way to charge smartphones using a chair. It’s not just any ol’ chair, however, it’s a newly created chair that converts kinetic energy into electricity.

Dubbed the MOOV, the chair encourages sitters to do just that—move! The chair converts any and all energy that is given off by the user into electricity, which can then be used to charge a device.

First, the user plugs in a USB connector and sits in the chair in order to activate the built-in sensors. Once the user sits, they must simply move in the seat (shakes leg, taps foot, you get the idea), which then creates a power flow throughout the chair. These small, but useful movements create enough power to charge a small device like a smartphone.

Now let’s talk tech. The chair converts the movements to energy by using piezoelectric crystals, which give the furniture’s material the ability to create an electric charge while responding to movement. The idea behind the chair was to turn otherwise wasted energy into a positive use form. While using the chair, moving is a must, as the constant movement of the chair reminds users to remain active while sitting.

There are no actual efficiency measurements at this point, so we’re unsure how long it takes to fully charge your phone using the chair, however, is a neat concept. A concept that I hope can be put to good use in the near future. (Taps feet.)