Correct a typo

course_notebooks/Week_4_GameFi&SocialFi/04_GameFi_SocialFi_Coursebook.ipynb

@@ -94,7 +94,7 @@
     "\n",
     "A tap is the source of in-game resources (i.e. you receive gold for finishing quests). A sink is where resources are destroyed or exchanged (i.e. buy an item for the gold earned). The analogy of a tap and a sink makes a lot of sense because it allows us to build a mental picture of a resources flow; If the tap is generating the resource quicker than the sink can remove it then an excess builds. Any resource that is in excess becomes effectively worthless to the player and they stop interacting with the tap.\n",
     "\n",
-    "However, the inverse can also be true: When there is too little resource coming from a tap then there is little motivation for a player to interactive with it. The correct balance between a tap and a sink is known as a pinch point.\n",
+    "However, the inverse can also be true: When there is too little resource coming from a tap then there is little motivation for a player to interact with it. The correct balance between a tap and a sink is known as a pinch point.\n",
     "\n",
     "In economics a pinch point is the level of supply of a commodity at which demand is maximised due to consumers becoming concerned about the supply. In games we can think about this as the point where the supply shows the utility of a resource but is scarce enough to have players continue to seek it.\n",
     "\n",