While checking out the Disney Treasure exhibit , I also had the fine time of going through the Ronald Reagan Presidential Library Museum and Memorial. The Museum is up there with the California Science Center with interactive displays that both educate and entertain. Of course, the biggest reason many come is for the huge Air Force One plane on display, you can walk through, heads up, no photography inside. Air Force One is a sight to behold and the area surrounding it with a presidential helicopter and motorcade below it. Walking inside of the behemoth is such strange flight, so different from any plane you've been on. You might notice a cake, which President Reagan had on all flights in case it was someones birthday as well as the football, the suitcase that contains all the nuke codes.
There's plenty more to learn and to discover about this president, through a huge collection of materials. It is a large place and with nothing nearby you might want to consider packing a lunch or eating at the cafe. The windy road getting there is kind of fun in itself too. Parking is free, so don't worry.