DS has several Magformers sets. We love them...until recently. Now they are repelling some(shocking!) and the structures crumble instantly. I swear it seems like the sets are different quality. It's very obvious some are stronger than others. I've been in contact with the company, and while they are very helpful, I'm also getting a little bit of the runaround. But come on, these things are expensive, and it is not ok with me for the castle to fall down the second we build it. DS is getting disappointed in a toy he was once OBSESSED with. Anyone else? I was planning on buying more, more, more....