Intelligently designed bird shaped climbing holds that all offer a jug. A great way to teach kids 5 different species of birds while offering them an easy to grab hold. And let's be clear, these are not just some 2 dimensional hold that the kids "may" be able to hold. The kids will definitely be able to hold on to them and have fun while doing it. I designed this set using my 4 year old daughter to test them on. She can navigate a vertical wall on them with ease.