A soothing sound toy with which to bathe the aural senses, Pianolina is a beautifully designed and gorgeously sounding Flash application created to introduce you to the sounds of the Grotrian piano. Choose between several different compositions and see how the notes react to gravity as they bounce around the display.

Ian Snyder's Valo requires the same painstakingly delicate touch as removing a funny bone or charley horse from the classic game Operation, albeit with a much gentler, more abstract style. Use your expert pointing and clicking skills to navigate dangerous fields of red squares while clicking on or dragging the mouse over all the blue squares to earn points and advance to the next level.

Musicovery is an interesting little web app that blurs the line between interactive toy and radio. Musicovery lets you choose and explore music by mood, style, genre, decade and much more. Mix and match filters and customize your internet radio experience to suit your tastes, even if that happens to be dark energetic pop or jazz from the 80s.

Frets on Fire is an open source clone of the ever-popular PlayStation 2 music/rhythm game, Guitar Hero. And just like Guitar Hero, Frets on Fire features a handful of songs and allows you to play the guitar sections by pressing just a few keys. Instead of using a separate controller to mimic the guitar, Frets on Fire lets you pick up the keyboard and jam in right front of your desk. Best of all, a built-in editor lets you tab any song, spawning a growing community of music-modders on the web.

Phase Toy is a simple Shockwave sequencer that allows you to create compositions using a point-and-click interface. Just click on a cell to have the sequencer play the corresponding tone when the 'play head' sweeps over it. Click and drag to add several tones at once. Phase Toy makes a nice little diversion that is as mesmerizing as it is relaxing.