Just back from Maker Faire in Newcastle, and it was one of my best ever festival experiences.
Kids loved ZU3D workshop -
http://www.zu3d.com - where they made their own playdough models and created stop-frame animations. Also DIY PIE (although they ran out of pastry for jam tarts), where they cut out and decorated oven gloves. They made pin-hole cameras from beer cans, designed and created pop-up cards, built amazing marble runs from cardboard and plastic piping and empty bottles (and masses of gaffer tape), also home-made compasses from paper cups and paper clips... We never made it to the guerilla knitting zone.
Some great audio stuff, in particular Mike Cook's hexome...
BIG PIECES: El Grando the fire-breathing dragon was pretty hot, there was a noisy robot fighting arena + Arc Attack show.
Fun pieces: the robot toilet cruising around outside the venue, illuminator imaginator pictures from glowstix, chainmail makers and a giant cardboard spider over a giant cardboard racetrack hosting wiimote controlled cars equipped with their own webcam eyes, a flirtboard interactive table that senses when your beermat is close to mine, the pulsing Emergence tree...