Moving parts and lights. Battery operated moving parts and lights help bring the simulation to life. To teach my grandchildren how jet engines are built and how they operate. And you can also find troubleshooting tips, fix your coffee maker and make your day a little bit happier. and 4 answers. Your car is literally exploding gasoline (in very small amounts) 50x a second! this set is for use by children over 10 years of age. When my parents came over the next day (I was at work), grandpa took the time to explain to the kids how it all worked, which was awesome. 35" L x 23" W color poster. Unfortunately, they didnt include an on/off switch, and he keeps forgetting to remove the batteries. HTML :