Z man is working on Expanded form on the bed. Yes, we homeschool everywhere! Montessori Materials used to have the number cards for free, I think I downloaded mine in 2004 when Big A was a tot. However, now they charge $2.50. I like their number cards they have both the standard and the miniature version. It is just incomplete for the Expanded form exercise we were working on. So I printed a couple of "+" signs large and small in gold. I laminated it all, and put the small version in a 3-part card folder. Both the folder and the number signs are available for download here.