We have a few exploration bins we use throughout the year but a favorite of Holly's are her Beach Bins. These bins are filled with sand, various shells she has collected from local beaches, small plastic sea creatures and a few miscellaneous mini shells she purchased a while back. Each time I bring these out they are new again. She gets out a magnifying glass and inspects them over and over. She sorts shells, draws shells and plays with the little sea creatures. Our beach bins are fantastic entertainment and a fun chance to learn too!