The kit contains all that budding artists need to create their own personalised card, including confetti hearts, felt and feathers.
There is also a leaflet providing creative inspiration for those who may be lacking. Suggestions range from a 'love bug' made from pipe-cleaners, a pom-pom and some goo-goo eyes, through to a fluffy photo card.
"We were looking for a really fun way for people to support the British Heart Foundation while enjoying Valentine's Day," said Aneesha Moreira, director of fundraising. "We think we've found the perfect answer in the DIY card kit - a really alternative Valentine."
The kit, which is on sale from the charity for a recommended donation of £5, is part of the charity's Real Valentine campaign, which encourages people to show their support on Valentine's Day by raising money to help mend real 'broken hearts'.
The charity hopes to raise £1m from the campaign, which also features a forfeit game called Love Match, in which players either promise to fulfil their partner's desire, or forfeit and donate £5 to the Real Valentine Appeal.
The charity's website contains a 'love-match generator', which gives helpful suggestions for dares, including 'do my filing all day', and 'massage my ego for the day with non-stop flattery and compliments'.
For a suggested donation of £1, members of the public will be able to write a 'love note' to their loved one and post it in the window of their local British Heart Foundation shop for all to see.
- For more information, visit www.bhf.org.uk/realvalentine.