Don't worry about getting bonsai. They come as often as the others, it seems, but if you're getting a bunch of the lanterns and bears, just keep selecting to refresh what your building needs until it comes up with what you have. You can do this and never, ever, need a bonsai.
It's all random, like with the expansion items. One day you may get tons of shovels and stacks and the next day you may get a lot of gears and stacks. I hate the random bull * of this game. But most of all that pisses me off more than anything is the wait times on the majority of the production items. I never see anyone complain about that. Not one item should take longer that 1 hr. This bull * of 2-6 hr's or more needs to stop.
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