Popsicle sticks, tape or zip ties. Straws if you want
At a popsicle sticks store
balsa
Depends on the design of the bridge, and how the sticks are joined. In theory I could build a bridge of popsicle sticks that would support several tons of weight- but it would take a LOT of popsicle sticks.
balsa
Yes
Popsicle sticks are made out of White Birch.
The best tool for cutting popsicle sticks is a sharp utility knife or a pair of scissors.
Popsicle sticks are not effective insulators because they are poor at reducing heat transfer. Insulators are materials that prevent the flow of heat, and popsicle sticks do not provide a significant barrier to heat transfer due to their low thermal resistance. Materials like foam or fiberglass are better insulators than popsicle sticks.
As an individual stick, not very. Popsicle sticks are made of Yellow Poplar, a soft, not terribly strong wood. But with laminating by using glue, and basic structural principles, very strong objects can be built of popsicle sticks.
The easiest way to cut popsicle sticks is to use a sharp pair of scissors or a small saw.
Well I think Popsicle stick