We ordered these for our four year old son and he LOVES THEM! He has been adamant that he is going to be an engineer when he grows up and these are perfect! He has spent hours of time creating fun little structures and I foresee many more hours of creativity ahead. Best toy ever!Update. These are still holding up as one of his favorite toys ever! He has spent hours crafting cool little brain flake robots to protect our house from bad guys! BEST TOY EVER!!!!!I am glad I made this purchase!I would highly recommend this set to anyone with kiddos who like to build and create.DO NOT BUY! The product I received is poor quality. My students tried to use them in class, unfortunately the pieces do not attach, the plastic is flimsy. They are sitting in my storage collecting dust . Very disappointed in this product!These are a lot of fun and really good quality. I am impressed with how many there are, we can build some pretty impressive things with more to spare. We purchased for our 5 year old son and they are very easy to put together and take apart. They are very sturdy as well. Definitely recommend!My son absolutely loves these flakes. It keeps him occupied for an extendend period of time. He separates them by color and make varies shapes with them. Great buy and value for money. The storage container is perfect! Great for travel! I am thinking of getting another one because sometimes i think he wants more pieces.I loved building type toys as a kid, but they're usually so boy-centric in color and style and these have all sorts of colors and flower shapes. Perfect to catch the attention of a young girl and keep her attention as she learns how to build things. My granddaughter will absolutely love her 5th birthday gift and I can't wait to build something with her. BTW... shipment was super fast and gives me that much more time to personalize my gift for her!The set is so versatile and the pieces are beautiful. My little one loves the way they interlock and have played with them every day since they arrived.Highly recommend for anyone that’s looking for a versatile, beautiful, and unique building set.The connection spot is very loose. I can’t make any shape. Returned it~My kindergarteners love working with these flakes. Good size and great colors. It is good for developing fine motor skills and eye/hand coordination. Even adults get interested in playing around with the pieces so it can be a good "fidget" item. It is easily transportable, the container is sturdy, and I don''t worry about the lid breaking and the pieces falling out. 720 pieces is more than enough!