Your baby ( 9 months ) is exploring containment to understand that objects fall out of a tube and stay in container. They’ll be increasingly interested in until about 18 months. How to do it: Show your baby how a ball goes into and then falls out of the tube We/ be had a subscription to the Lovevery Play Kits since my daughter was born. The Clear Tube w/ Stacking Rings is one of the Play Things from Play Kit for 9-10 months. It is not sold separately. My daughter loved play with this toy, stacking and unstacking the rings, holding the rings and ball up and looking through them and dropping various item down into the tube and rescuing them by pulling the tube out of the holder. Give them something that’s too big to fit in the tube and talk about why it doesn’t fit. At 10-11 months your baby may be able to pull the rings off the tube, or tip the tube so that the rings fall off By 15 months your baby may be able to put the tube in the base and stack the rings around the tube Everything in excellent condition Montessori inspired and eco- friendly, built to last and made with sustainably harvested wood and nontoxic paint