My main focus is that the weapons have to be safe, so kids can play with them without direct adult supervision, without getting hurt. And secondly so easy to make, that big kids, with help, can make it them self.
These weapons is perfect for a backyard battles or a game of LARP (Live action role play) in the nearby forests.
If you keep the design simple it is easy to make, and with adult supervision kids can make their own.
The other guides:
Step 1: Things needed
A hobby knife, with interchangeable blades.
Used dull blade
a piece of cardboard or paper
a black marker
a cutting pad
double sided tape
Silver tape, for decorations.
a sleeping pad
10 cm of foam tube
2 strips of cotton cloth
3cm thick bamboo, fiberglass or a broomstick
Step 2: The design and research fase
Now you have enough inspiration to make you own design.
Just draw some quick sketches. They don't need to be beautiful, it is just so you will get the idea about how your sword will look like.
Don't make the design to complicated. Special the crossguard, it is easy to make a very good looking design on paper but it is difficult to make it in foam and duct tape.
My sword will be an elf sword, inspired by Frodos Sting from Lord of the Rings.
Step 3: Template
If you have problems with making the two sides of the swords identical, fold the paper in half and cut it folded. When you unfold the paper the template will be perfect, and the two sides identical.