My 6-year-old and I have put this together many times. The pieces are sturdy and they fit together well. If you try to pick it up when it's finished, it stays together and doesn't fall apart. I love that! The glowy-ness is surprisingly vivid and long-lasting. It's a great way to bond with your child by working together for a common goal, problem solving, spatial relationships, and other things with a beautiful reward at the end. Great purchase!
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