father wanted an aussie to record a message from tooth fairy to his son .
jacob hall , from iowa in the u.s. , made a call for help on website reddit .
victoria 's jeff pyrotek made a 20-second message as ` bruce ' the tooth fairy .
mr pyrotek , who is a father-of-three , said he wanted to make the boy 's day .
so far , mr hall 's message has attracted more than 100 comments on reddit .
mr hall said his son , evan , believed the tooth fairy was from australia .
he explained last time evan , 7 , lost a tooth the fictional creature was late .
so mr hall told him this happened because the fairy was from down under .