I carefully painted an expanding tax file folder front (under the flap) with chalk board paint so it wouldn't warp. This covered up the big IRS on it and makes it a fun space too. Once dry, I used stencils on the flap to label it.
I then carefully removed half the partitions in it to make room for the activities.
I made a few activities and bought a few and filled up several zipper bags.
I used 3 ring zipper bags (in case they want to put them in a binder instead) and then simply popped them into the folder file.