Kids use them and get excited about trying them out. The only problem I've run into is that they constantly fall off the kids feet. The velcro closure in back isn't all that great...especially if the child's foot doesn't fit completely inside...yet their feet are too small for the next size up.
These fins are great. The velcro straps in the back allow you to adjust the fins to stay on tight. They work as good as the fins my toddler uses in swim lessons.
these are great to help little ones with the darn bicycle kick! they are super soft and stay on really well.
The flippers have really helped our child move her feet correctly in the water.