CAREFULLY THOUGHT-OUT DESIGN to ensure this toddler tower is a good fit for all kids below 150 lbs; even for those rambunctious little ones. They can all explore their new found independence in a Montessori setting. PROTECTION ON ALL SIDES Not just a step stool, but a fully enclosed tower. The sliding door is easy to use ensuring climbing up and down is a breeze while still making sure the child won't fall out while standing in the tower. ADJUST HEIGHT IN SECONDS Easily switch between the 3 levels of the platform - no need for screws and tools. All this due to the thicker sides and platform that allowed us to implement this mechanism.