The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Team Freelance:
Designed specifically to bring a unique sparkle to the 'evening with imogen heap' performance at the Royal Albert Hall on Nov 5th 2010.This colour changeable sparkler brings the bonfire night fireworks indoors and also celebrates the premier of the 'love the earth' project!---Imogen Heap wants to enhance the visual effect of a sparkler for this special gig, this app allows just that. Join in with others and help create an amazing effect and wave your IH Sparkler high in the air and make this November 5th a night to remember!Can you find the hidden multicoloured sparkle mode?