Por si algún profe quiere investigar sobre estas 70 apps y ver si le son de utlidad. Yo uso algunas // The 70 Best Apps For Teachers And Students - Edudemic. These are listed as itunes apps, but I'm sure a lot of them can be found for Android as well.
This listing is for set of themed masks. This set includes 1 of each: Catboy Gekko Owlette Luna Girl Romeo Night Ninja This hand crafted mask is made from high quality felt and is very durable. Each mask has an elastic strap on the back of the mssk.