We purchased a kit for my then 3 year old about a year ago. Now my son is 4 and we use the cards still to this day and the playdough gets taken out regularly and is still in great condition! The heating and cooling pad has come in majorly handy. We keep it in the freezer and use it as a way to calm my son down when he has some big feelings or at night when he gets foot aches and growing pains. We used the journal a lot in the beginning but need to get back into it. All in all, a great investment into my sons mental health and I can honestly say the products inside have stood the test of time.