This seriously fun experiment uses vinegar and bicarb soda to power the bottle rocket more than 5 meters. Play for hours with this reusable Fizz Rocket. Liquifly works on the same principles as other rockets, sourcing its energy from vinegar and bicarb soda to create a thrust to send it flying. Not intended as a toy for young children. Choking hazard - small parts. Adult supervision for children under 14 years.