We have around seven hundred boomwhackers and can get hold of many more so they are the ideal thing for big conferences where you want hundreds of people all playing together.
We would generally run a 30 minute session and will work with you to decide the programme so that it relates to the message you are working with during the rest of the event.
This is what they look like:

Each colour plays a note and there are six different notes. The teamwork comes about as participants link up with others to create rhythms and pulses. We have a whole variety of activities designed to put across common metaphors related to organisations, teamwork and communication.