Sonic Screwdriver for Secret Messages

(techfresh) -- This Sonic Screwdriver works as a hidden ultraviolet pen with a special UV light. In other words you can use it to scribble secret messages which can only be revealed using the sonic screwdriver. The instrument also features sound effects and includes a spare standard ink nib and a wipe on wipe off psychic note pad. Available for a retail price of £9.99.