This is a guest post from my husband, Craig, whose boyhood dream is to be an astronaut.
With a pair of two liter bottles, a few backpack straps and some screws – you can build your child a do-it-yourself Mentos and Diet-Coke working jetpack. I would advise doing this in an open field otherwise you will be retrieving your child from the neighbor’s roof.
Conversely, here are the directions on how to build a pretend rocket backpack for any small child. Spray plastic primer on a pair of empty two liter soda bottles. They typically don’t have this at Wal-Mart, but you can get it at Lowe’s/Home Depot. I screwed the bottles upside down into a cardboard box to keep them in place while I sprayed them.
After the primer dried, I sprayed it with some high gloss silver spray paint. I used the same spray paint to paint a thin square piece of wood. I removed some backpack straps from a discarded kids backpack. Then I lined up all the parts up, drilled some holes and screwed it all together. I cut off about four inches from the top of the bottles to make it look less like a pair of soda bottles. And then attached some rocket flames made from scraps of orange felt and glitter tulle to the bolts inside the bottles.
Acknowledgements: I would like to thank our friends, Meredith N. and Anna R., for telling us that Callen “Totally needs this…” when they first saw the idea at http://pinnedit.blogspot.com/2011/09/jet-pack.html.