use TOYS20 at checkout and use BUYNOW20 at checkout
comes out to 57 cents per piece for Magformers.
this can be combined with other magformers to hit the $48+ amount and get $15+ kohls cash.
example is ice-world-set [kohls.com]
which is about $2.50 more than this front page deal
all in all, if you value the kohls cash, this looks to be a great deal.