Figure on the left below, shows six coins arranged in the form of triangle. By moving two coins, could you make a triangle upside down (as shown right below)? Kids may not enjoy the puzzle itself, but they will be stimulated to make triangles.
Similarly by having ten coins arranged in the form of triangle (as shown in left below), could you make the triangle upside down by moving three coins?
What is the smallest number of coins needed for 15 coins in the form of triangle (as shown in right below) to make is upside down?
More Good Games:
- Here is link for a nice Guessing Number game for kids aged 6 and above. I found this game in Singapore Science Center. If your kid is above 8, ask him/her to find how the number could be guessed. It is based on concept of binary number.
- 3D Tick Tack Toe: This is another game I found in Singapore Science Center. Indeed, it is lot of fun for the kids and helps their orientation skills! One can create this game in your home by using three throw-away CDs, CD writing pen, some books for support and chess pieces as shown in the picture (once can use backgammon or just different colored coins). On each CD, draw a three inch square with CD writing pen, subdivide the square to nine small squares just as in normal Tick Tack Toe. Buid the setup with CD over each other with the edges put between the books for support as shown. The game is similar to tick tack toe, but now one has to put three pieces in any straight line in 3D - in horizontal plane like usual tick tack toe, horizontally, vertically, diagonally or slanted-ly.
- Another good game is 3D Tick Tack Toe, in four planes. This is played against computer and quite challenging even for adult. One good feature is, it notifies you if there is a threat or if you block the threat.