example game 1:
Two or more players each choose a color of little ninjas. Everyone tries to kill (knock down) other player(s)' little ninjas by taking turns to use the big ninja: you drop his head into the ninja castle at the center and he will jump back out to kill the little ninjas! Once a player's little ninjas are all killed, he is out of the game. The remaining players continue to take turns until the last survivor wins.
example game 2:
Two or more players all try to hit the blue ninjas and avoid the red ones. If a red ninja is knocked down, the kill doesn't count and all red and blue ninjas hit in this turn must be put back up. At the end the person having killed the most blue ninjas wins.
example game 3:
Two or more players each choose a color of ninjas and try to indirectly kill them by hitting the red ninjas first. The red ninjas are put back after being used each time. A player wins once all ninjas of the color he/she picked have been killed. The remaining players can continue until only one is left.
For all three demo games, the little ninjas are set up roughly 7" away from the outer surface of the castle (applies to blue ninjas in game#2 and red ninjas in game#3). You don't need to be too precise since this range is quite forgiving thanks to the big ninja head! Your Dindio may have a different range than mine and you can find out by simply doing a few test knockings.
Below is how you can make your own Dindio: