Sling Shot

Sixteen millimetres of tube, and it still punches like something twice the size.

Sling Shot fires white strobe, red and brocade bursts with crackle stars cutting through them, 36 shots over forty seconds from Celtic. A 16mm tube does not usually give you this much. Rated F2, a garden firework: keep spectators at least 8 metres back for safety.

Thirty-six shots is a lot of garden sky for a cake this size, and good proof that bore is only part of the story.