we used j week to explore metal vs non-metal
with huge bags of thrifted wooden beads and more bags of jingle bells, we made necklaces and tree ornaments.
before we made them, all the bells and wooden beads were mixed in a large bucket. when we sunk a magnet wand in and pulled out, it was covered with jingle bells. that was a good time. i recommend it.
newcreationpreschool.com 
oooh those wooden beads are gorgeous!
I will definitely be using some of your ideas for my new Parents as Teachers job!