Review on Customizable Building Block Plates: 8-Pack Self-Adhesive Base Plates For Wall Or Desk, Compatible With Major Brands And 440 Pcs For Fast And Easy DIY Fun! by Jody Kashani

These don't stay on and crumble in your hands.My child loves to bulid and has all the duplos. I wanted to buy him more duplo blocks so he doesn't have to keep taking apart his creations to build new ones. These blocks had all the shapes he needed and were cheaper than the duplos without all the unnecessary pieces he doesn't need anymore.After having them for a couple of days I realized that these blocks don't stay on and crumble in your hands. The real duplos stay on and sometimes need a grown up to pull apart whereas these blocks fall apart immediately. It's been very frustrating to bulid anything.I would like to return them but they're all mixed up with our duplos so that wouldn't be possible anymore.Please don't buy these they're just horrible.