Bought these last Christmas for my 4 yr old son who really had no idea what a Lincoln Log was, but I thought it would be something he could use to build "pens" for all his toy plastic animals with. Much to my disappoinment, he could have cared less about the logs.But for the past few weeks (he's almost 5 now) he has been digging them out and building all sorts of forts, sheds, houses, castles, you name it! He really seems to enjoy them now. These aren't as well made as the original Lincoln Logs, but what seems to be these days? But they will do. I find the grooves aren't as deep, so the logs sometimes just don't fit or stay together that well. Only other downside is they don't come in any sort of good box that can double as storage, so I had to go out and buy a container with a snap lid to contain all 300 pieces.