Aurora Rocket Fuel Box
Aurora Plastics Corp. Rocket Fuel.
The box contains two bags of the Concentrated Liquid Fuel and one bag of Reactor Pellets
I picked this oddity up on ebay. From what I have been able to determine, the 'liquid fuel' powder seems to be an acid while the pellets are an alkali.
The reaction is similar to Vinegar and Sodium Bicarbonate (Baking soda) and produces a gas that reacts like CO2
Googling turns up only a few references to Aurora Plastics and they seem to make plastic models - no flying rockets, though.