4’x5’ styrofoam “Frozen “ castle
You can make a castle out of cardboard and use the Styrofoam for ice blocks. Since they are already white, all you have to do is add glitter.
I would start with a large appliance box and add styrofoam to decorate it.
Here's a cardboard idea! Fun!
Check with stores that sell appliances and ask for a couple of boxes. That would be a good frame. Then add styrofoam, paint, glitter, and fake snow. You might still be able to pick up some icicle decorations in after Christmas sales. I would find a few inspiration pictures to use as a pattern.
A large furniture box maybe? Not sure how old the child is.
This DIY looks adorable. https://www.hallmarkchannel.com/home-and-family/how-to/diy-frozen-castle-out-of-cardboard
Check out the castle at the bottom of this link using cellophane wrap!
Thank you everybody!