Throwing stick, you can make one with tubing quite easily; might need some practice and experimentation though.
Plastic ruler with some sort of case on the end (a plastic lid cut down and probably shaped)
Blow tube, not sure on range though.
If it's warm, maybe worth freezing some in water, that will give you some weight to throw it.
Follows Phils post (thought for the day I think) on his remote control boat.
Bagging waggler, basically a feeder on the end of some heavy duty dowling, then mix your feed up with groundbait or ovaltine (sticks bait together) and launch it to where you want it.