If these all seem too complicated and you're looking for a game for a younger child, try the Star Wars Loopin' Chewie game. With an armature that swings in a circle, your station will look to deflect Chewie to another player's station knocking down their Stormtroopers. The player with the most Stormtroopers at the end wins.
Of course, my four year old's strategy was to constantly hit her deflector like a crazed game game of Hungry Hippos. Our family had the most fun playing this one together. Just know that playing with a four year old is somewhat like playing with a Wookie in that letting them win is a good idea, After an hour of playing with it, they became pros and I loved watching all three kids play together and having fun.
Hasbro Star Wars Giveaway