Crafts for children mask heroes from paper with their own hands.
My kids like to play cartoons or evenself-fictional super heroes and often with their own hands make themselves out of paper interesting masks for their game. Such crafts do not take much time, my sons play them even outdoors while walking with their friends, and they can be created from any available tools in your field of vision besides, in fact, paper. We still did for children cool masks of felt. For our children's crafts, we will prepare multi-colored paper, scissors, glue, and also need an adhesive tape. For convenience, you can print a free template for cutting a mask from paper-in two sizes: for adults and for children. 
That's how we usually go through the creative process of creating any crafts for children. 
And you can get such masks for boys too. 
Wonderful super heroes are eager to fight in simple, but very realistic masks, made by themselves!))
