Reviews are not required, and you do not need Amazon. All these items are free.
Why are they doing this? Well, Amazon charges a storage fee. When the seller has too much of anything, they would rather give out the samples than pay the outrageous storage fees. This seller is not going to do anything more than mail the item to you- that is it. If you are interested- please complete the form with your mailing address and phone number. (The phone number is needed in case DHL has to call you about any delivery issue)
What will you be receiving? It can mostly be clothes, and toys. But don't be surprised if it is something else like electronics or bedding :) If it doesn't fit- or you don't like it- you can always gift it or donate it. Now, because it is a large quantity of items, you cannot be sent a particular size. It will be random.