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Hey Jeff,
We've made popsicle a few times before. It takes a LOT of liquid
nitrogen to get the popsicles frozen all the way. I freeze all of my
materials ahead of time and pulled it out of the freezer at the last
minute. You can also place the materials in an ice bath to keep the
temperature down as you bring in the kids and introduce the materials. I
could not find metal popsicle molds so I tried the molds at Walmart and the
Dollar Tree. The molds from the Dollar Tree worked better and was cheaper.
You have to be careful when you pour the liquid nitrogen. I placed the
molds in a large metal bowl. I would pour the liquid nitrogen on the edge
of the metal bowl until the liquid begin to solidify and them poured a
little bit of the liquid nitrogen on top of the molds. The last time we
made the popsicles for a group, we only filled the molds up half way. The
results were a lot better and it cut down on some of the time it took to
make the popsicles. For school groups it usually does not work for us, We
have a 45 minute window to make ice cream and serve it to the kids. I've
only made popsicles for special groups and we had them doing other
activities off and on while we finished the popsicles.
One idea that we have not tried yet but might work better would be to use
candy molds instead of popsicle molds. It should cut down on the time and
amount of liquid nitrogen that you use. I would suggest looking for the
molds in which you can place a stick into the sides of the mold or have a
little bit of a deeper area towards the outer wall so that you can rest the
stick into the mold.
Best of luck,
*Laura Dameron*
*Director of Education and Exhibits*
* *
*Imagination Station Science and History Museum*
*224 Nash Street East*
*PO Box 2127*
*Wilson, NC 27894*
*252-624-9913 office number*
*252-291-5113 museum main line*
*252-291-2968 fax*
*[log in to unmask]*
* *
*www.imaginescience.org*
On Wed, Oct 9, 2013 at 10:25 AM, Jeff Rosenblatt <[log in to unmask]>wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
>
> *****************************************************************************
>
> Has anybody ever used liquid nitrogen to make frozen popsicles? If so,
> does it work well, and does it take very long?
>
> Initially, I see more challenges than success with this. Thought I'd ask
> before we try it.
>
> --Jeff--
>
> Jeff Rosenblatt
> Director, Kansas City's Science Center
> Science City & Arvin Gottlieb Planetarium
>
> Union Station Kansas City, Inc.
> 30 W. Pershing Rd. Suite 400
> Kansas City, MO 64108
> Office: 816-460-2218
> [log in to unmask]<mailto:[log in to unmask]>
>
>
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
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