i will show you how to make a simple lego jetpack you only need 5 lego peices sorry for the grapphics
Step 1: Peices
get the pieces as showed the black piece you can get from the power miner crystal king set
Step 2: Assemble
get the 2 cylinder piece then put it on the 2 bottom holes on the black piece the get the rectangle piece then put it on the 2 holes on the black piece then get the small circle then put it on the front hole of the black piece it should look like the picture the picture shows the side view of the jetpack (SORRY FOR THE COMPLACATED EXPLANING BECAUSE I DONT KNOW THE NAME OF THE PIECES)
Step 3: Done
put the hole on to your minifigure's neck then put on the head.blastoff!!!