No Thank You Evil is a RPG system from Monte Cook Games targeted at beginning players. As the cover says "Ages 5 to Infinity" . The system is quite simple and relies on die rolls and tokens. As in almost RPGs, the gamemaster guides the game and creates the adventure. Whenever the players have want to attempt something, the GM sets a "goal" from 0 to 8. A goal of 0 is something the players can easily accomplish, such as walking or talking. Higher goals are set for more difficult activities. The players can spend tokens from their characters to make accomplishing the goals easier.
I had the opportunity to play No Thank You Evil a few weeks ago. It plays well, comes with lots of components and bits and a session can finish in about 30 minutes or extended longer if the players remain interested. If you are a parent looking to introduce your kids to RPGs but think D&D is a bit too complex, No Thank You Evil is a great alternative.