Additional activity mat for they saw between 2 locations. It has beautiful colors and beautiful patterns that have everything from baby interested on. Mobiles are nice, including the star which unfortunately is not easy to trigger for a "small" 4 month (you must press hard desssus, I think it will be good to 6/7 months). On the other play mats, our baby has a musical mobile that fires with a handle or simple shock (and therefore reaches its trigger for 1 ½ months). As said by many, the carpet is very thin, so you put a blanket or towel underneath. Still, for the price it's very good and baby is happy!