Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Durable Fun

I was skeptical when I bought these blocks and thought they might be flimsy as they are made of cardboard. But I gave them a chance and I'm so glad I did. These blocks are WAY more durable than I expected- my son is super rough with them and they show almost no sign of wear six months of regular play later. He has repeatedly stepped/ stood/ sat on these blocks and they hold their shape amazingly well.In addition to being durable, they are also lightweight so that if a tall tower falls, no one will get hurt.I definitely recommend these to anyone who is looking for a durable yet safe toy to provide hours of great imaginative play.**UPDATE:** Two years (and another child) after purchasing these blocks, they are still in remarkably good shape! They've been beaten on, thrown, jumped on and kicked and are still going strong. :)