After some interesting launches the rocket did make it into the air.
This rocket came in a kit. It has balsa wood fins, a stopper and a tube that keeps the bicarb separate until it it mixed with the vinegar.
To mix the powder and vinegar you tip the bottle and then place carefully on the ground.
1 cup of vinegar and 3 tablespoons of bicarb in a softdrink bottle.
Need some ideas to build your own rocket? Try this site: http://inspirationlaboratories.com/ways-to-build-a-rocket/