The  McGraw Hill 6th grade book series of games. 
 Instructions: 
Find three coins of different sizes (e.g. quarter, nickle, penny). 
Flip each and record the head/tail value. 
Look up 
the total with tip
. Flip the three coins and do a look up in 
the total excluding the tip 
.  
Determine the percentage tip
. Your opponent may challenge you. 
Look up the answer in the table on the next page. 
If you are right and your opponent didn't challenge you, you get a point. 
If you are right and your opponent did challenge you, you get two points. 
If you are wrong and your opponent challenged you, 
your opponent gets a point. 
If you are wrong and your opponent didn't challenge you, nobody gets a point. 
Your opponent plays next.
 vals[0] | Tips | | Coin tosses (largest to smallest): | TTT | TTH | THT | THH | HTT | HTH | HHT | HHH | 
| Total with tip | 117 | 119 | 121 | 123 | 125 | 127 | 129 | 131 | 
| Total without tip | 97 | 99 | 101 | 103 | 105 | 107 | 109 | 111 | 
   On a different page so the players have to turn to it...