One Man Band is a charming, easy-to-use music toy with a surprising variety of musical progressions -- i.e. not your simple 1-4-5.
"Robot Beavers"
Kick Drum: 3
Snare: 3
Cymbals: 2
Wheel-to-Reel: 1
Computer
Scratchmatic
Tubular Bellows
Steam Pipes
"Sauntering Geist"
Piano 3
Bass-o-Matic 2
Wheel to Reel 2
Snare 3
Cymbals 1
"Juggalo"
Clockcordion
Bass-o-matic 2
Kick drum 1
Snare 2
Cymbals 3
Wheel to Reel 3
Another little toy/game I found interesting was
Olla Podrida PLEXUS puzzle. It's like a jigsaw puzzle, except instead of the picture spanning all the pieces, each piece is a picture in itself. It might seem intimidating at first, but once you get a few together, the rest fall into place pretty quickly. Press the left or right arrow keys to rotate pieces.
Finally, check out
TBA - a game resembling the Donkey Kong barrel shooting levels. Simple but satisfying. Hit the spacebar to fire the ball out of the, uh... ball-firer-outer-thingys when the timing is right. The first couple of levels are pathetically easy, but they'll soon get harder.