Acrobots are little 3-legged acrobatic robots that hop and jump around and react to each other. Together they form an unsual webtoy that includes impressive physics as well as some very fluid animation. Very nicely done by the same Vector Park folks that brought us Levers, and Feed the Head.

If you haven't played Feed the Head lately, there are new features to explore! It represents a piece of interactive entertainment of a type we don't often see anymore. There is perhaps no goal, no win condition. It's just plain fun to play. An enjoyable little webtoy for you to discover on your own terms. Spend a couple minutes or an hour. Lose yourself. Feed your head. Escape.

Free Rider 2 is a sequel that continues the more interactive spin on the Line Rider formula. Using a large tool set you can sculpt, edit and decorate the environment any way you choose. When you're done, take to the arrow keys and drive your rider through the stage. It's webtoy-meets-level-editor kind of experience, and it's even better than the original.

Ha55ii, creator of the previously reviewed Liquid Webtoy, has put forth another addictive webtoy: Powder Game. It bears a similarity in essence to the Falling Sand games, but takes it a step further with the introduction of wind and air pressure.

Seed is a soothing, botany-based webtoy diversion that lets you cross-breed several different kinds of flowers into pretty mutant hyper-flowers. Just click, drag and drop to crossbreed, or sit back and let evolution take over. You can even share your creations with others as you discover different varieties of remarkable looking flowers.

The Calamity Game is a web toy that combines the complex, physics-based building of Armadillo Run with the free-form creativity of Line Rider. The app lets you craft solid structures, draw, use anchor points, add directed force and connect everything up with springs. Calamity is forming a community of users who are creating and sharing some enormously creative scenes.