Hevisaurus are a Finnish heavy metal band, who's music is aimed at children. Their super-rad puffy dinosaur costumes are a weird hybrid of Barney The Dinosaur and metal bands Slipknot and GWAR. If your kids like their tunes hard and heavy, we suggest you go have a listen.
They describe themselves as "blood-thirsty warrior beasts that drink milk, eat cookies and stay in school". We've carefully filed them under Jurassic Metal.