Ninja Crafts, I have found, can be quite polarizing. Some parents think they're super fun and great for birthday parties. Other parents are uncomfortable with kids using weapons like a sword, ninja stars, and such. While I don't condone violence, I do realize that making toys that shoot, launch, or fly (like this pom pom shooter, car launcher, or this 1 sheet paper kite) are always crowd pleasers. (Plus, they're a great opportunity to slip in some STEAM learning.) So today I'm sharing this…