After the interest in our Traffic Lights demo at the 8th MK, and the success of selling Emergent Value Project kits
http://www.emergentvalue.co.uk/wordpress/go/mk/ to do both Traffic lights and simulate a Parking Sensor, I'll have some onsite for demo and sale.
The next kit will be designed to take avantage of the Scratch sensorboard capabilities and programs. Your comments will be recieved with interest.