Ok, I got really excited to buy these for my kids. I liked that they link together. However I am pretty disappointed with how incredibly hard they are to separate! Like soo hard. They came with a tool. But in my opinion the tool has a poor design. Weve only had the pixbrix for over a week or 2 and my kids have made lots of little things. But... I have to help more than I thought Id need to. Because they are so hard to take apart once they are together. And even with my help, I am struggling. My...