I believe the foam in that video is technically called floral foam. It's a kind of foam that you use to put together fake floral arrangements and is very light with a fine cell structure. You can get it in a green color in Michaels craft stores and maybe Hobby Lobby if you have one nearby. They sell it in hobby shops too where you can buy model trains under different names. The stuff for train building dioramas is usually a lot nicer than the floral foam since it is designed for the purposes of mini-landscaping.

When you use those foam tools just make sure to have a fan suck the fumes away from you, it can be smelly. You can also use a soldering iron to put in details or the foam knife tools in our online store. The foam tools are designed for foams while soldering irons can work but get hotter than needed.

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