Pastehttp://www.homedepot.com/p/Unbrande...Plastic-Cardboard-10-Pack-WC4896-10/202489118That is a great idea!! Where do you find that at Home Depot? Is it expensive?
This is the link for it online but I found it in my local Home Depot sold individually. I don't remember exact price but roughly about $11.00 a piece and I used 2 1/2 pieces to make it. You could use less pieces and make it smaller or more pieces to make it bigger. It is very easy to cut with scissors or a knife.
After I was done with the goslings last year I taped the 1/2 piece that was leftover in the middle and separated it into 2 sections for different aged chicks. Very easy brooder and so easy to clean!
Trish
You can hire my DD to make that and the small cage we have that you liked! The guys laid off with to much time 
Happy hatching everyone!!!