First off, in Franklin, clicking the radio enough times fastly on the "Mortal Kombat song" will make the game make echos, and clicking at the end where the second song would play (SWF Decompiler only), you can keep the current music playing or crash the game and your SWF Decompiler.
For Dora (SWF Decompiler only), enter the main game, then click on where the title screen is, and the stars will be there, grabbable and all. When you enter the tutorial, there will be twice as many, although they will disappear when the real game begins, sadly. You can also click at the "Watch Dora the Explorer on Nick Jr. / Play Again" page to have the stars appear there too! Clicking the stars too much will crash the game (and your SWF Decompiler), so use this glitch with caution.