Blowgun =
1 good straw
2 common pins
1 Q-tip
cut Q-tip in half, incert common pin thru big end(cotten end)so it sticks out of small shaft about 1/2 inch or tape it to shaft(some modifications needed),and wala you have your own cheep blowgun.....Dart board extra...

.used to have hours of fun and it didnt cost anything..