Hevisaurus are a Finnish heavy metal band that formed in 2009 with music aimed at children. The band members are known for performing in dinosaur costumes. Hevisaurus's debut concert was at the Elämä Lapselle charity concert on September 9, 2009. Their first tour started at the Tavastia Club in Helsinki on November 22, 2009.

Source: Wikipedia (https://en.wikipedia.org/wiki/Hevisaurus)