For the sense of smell work we got creative! The rose petal is silk (a box from Michaels in the wedding section) and we sprinkled rose essential oil on to make it really smell! The brown circle is cinnamon. I put circles of glue on waxed paper and sprinkled cinnamon on it and let it dry for two days- worked great! The cedar is cut from a tree on our playground, and of course coffee beans!