|This particular toy was offered by Honor House, a big name in the comic ad mail order business.|
For those not familiar with this toy, you fill the rocket to a line with water. You then attach a small hand pump to the base of the rocket, latch it in place and pump it full of air. Now I'm pretty sure the actual instructions gave some kind of advisory as to how much air you should pump in to it but we always pumped it until there was so much air inside that we couldn't work the pump anymore (ie: maximum thrust mode). Aim up at the sky (very important!) and release the latch holding the rocket in place.
|Actual mail order rocket still in original box (year unknown)|
You can make one of these at home, presuming you have a hand-held air pump.