Virtual Collaborative WhiteBoard: a private virtual playground from GroupBoard - draw together, chat, add to a message board.

Soda Constructor: a virtual animated tinker toy. Be sure to visit the Sodazoo to get a taste of the remarkable variety of fascinating, interactive constructions.

Sandlot science: illusions for fun and learning

The OnLine Games Collection from ishouldbeworking.com

Sand Art: drop virtual sand into colorful piles.

Clickmazes: interactive mazes and puzzles

Taprats: java applet and application for playing with Islamic star patterns

Tesselating Animations from Japan Tesselation Animation Design Association

A veritable compendium of Shockwave games

Mini-Mizer - create a virtual lego person

Map Machine from National Geographic - Global fun

Astronomy pix - Cosmic fun. See also National Geographics Virtual Solar System.

My Physics Lab: play and learn with interactive simulations

Scott Kim: Scott calls himself a "Puzzle Master." In my estimate, he's underselling himself. Check out his puzzles on  NewMedia Brain Candy and Discover Brain Boggler.

Standing Ovation: virtual approval from PlayFair

HumanClock: making fun with time

The Powers of Ten - from macro- to microcosmos

Phone Spell: answer the question of the ages - what does your phone number spell?

KidPad: a graphic, collaborative storytelling tool for kids

Toy Stories - games with toys by Major FUN

The Play Pump - a playground toy that brings life to an entire village

Mechanical Toys - toys you can make yourself

Sensory toys - one of several collections of healing fun stuff from Pocket full of Therapy

Silly Putty U: the official virtual home of Silly Putty. See also Silicon Bouncing Putty: the unofficial, but equally creative, informative and silly; and for more tricks and more putty "Crazy Aaron's Putty World"

Office Playground: toys for the office

The Toy Manufacturers' of America Guide to Toys and Play: "ONE OF THE MOST IMPORTANT THINGS A CHILD CAN DO IS PLAY" See also, TMA's "Fun Play, Safe Play"

Dr. Toy's Rx for Play is a resource for wise reviews of kidworthy toys

Instant Fun: little fun things for your emergency family fun kit from Playing Smart

Aunt Nettie: fun stuff for slow times. See especially "Naughty Restaurant Tricks" and "Car Games"

Situation Puzzles from Jed Hartman: classic logic puzzles for very long evenings.

Cheapass games: fun, wacky, and, uh, cheap.

Lego Games: Games with, mmm, Legos

Pentix: Pen spinning

The Dice Stacking Book - from Todd Strong, formerly of New Games. Dice stacking. Who knew? Click on his website and watch the magic.