Is your child borderline obsessed with mermaids? Have they got the tail, the toys and all manner of bejewelled accessories? If you answered yes, this is the next logical(?) step. If you answered no, give it time. We love all things mermaid and fantastical here at Hamleys HQ but we also love all things that make life a little easier on Mum and Dad. If this doesnt minimise hairwashing tantrums, nothing will. .