Adam Archer Becomes an Alien Visitor

Young Adam Archer gets stuck in a shabby circus space alien costume and in the rush to move on the costume is loaded on a circus truck with him still inside it. Later he falls off the truck by a farm with no idea where he is.
As his dad searches for him miles away, Adam walks into the town of Somewhere - that has an about-to-open alien creature themed amusement park - and causes a stir among all who see him. Some old coots inclined to shoot whatever they don’t understand, rush to kill the strange visitor but the police and other locals head them off. Because his voice is muffled by the suit and many locals really, really want to believe he is a true alien, Adam must play the part for a time.
An Army team and a rival team of secret government agents try to take him for study which pits those groups and the locals against one another as they plot and move to steal Adam the alien back and forth from one another.
Dad arrives where all the groups are milling around as Adam, remembering dad’s example of always troubleshooting to try to make stuff work, gets more active in his own defense. When the armed old coots join the confusion, things go bad fast. Many scared people running around with guns leads to chaos. When someone spots the alien, a volley of gunshots is the response. But no body is found in the bullet-shredded suit and no definite answers can be given about why not.