Subject: can I use two small battery-operated air pumps to propel a toy boat?

I'm thinking of making a novel toy r/c boat for my son, and using a small 
battery-operated air pump (actually two, that a friend of mine has offered) as 
a propulsion unit, blowing out the stern to create thrust, and (by using two -
possibly fixed, to keep things simple - nozzles and adjusting the rate of air 
flow through one or the other nozzles to steer the thing... It's all a crazy 
thought at the moment, but I kind of like the challenge.

I'd appreciate your thoughts.

Re: can I use two small battery-operated air pumps to propel a toy boat?