Foam rubber easily breaks, bends over cracks and rips into pieces. The base you build is MUCH weaker to support a full permanent structure. Because the standing parts were so heavy there was really little support to keep them upright. It crashed many times during construction, causing further fractures. The instructions start out simple but get very vague as you go through the small steps that can be skipped. They also don't provide you with a tool to properly stamp parts and their small parts. I wish I hadn't bought this, it just went to the trash!
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