I need large quantities of HO scale prickly pear cactus for my layout. I figue I will need 50-100 for my 3'x6' layout. That means, they need to be quick and inexpensive to make. I can't claim credit for this idea, but I think it is worthwile to pass along here. Here are the raw materials: Twist ties from the produce section of the supermarket. These need to be the wider paper type and not the narrower waxy type supplied with garbage bags. Also, some needle nose pliers, wire cutters, some green paint, and some scalloped edge scissors, usually sold with scrapbooking suppplies at craft stores. I paid about 3 bucks for the paint and scissors combined. Here, I have already cut the twist ties in half using the wire cutters.