I can usually tell when my 3 year old daughter is lying because either her speech is quieter, or she acts excessively generous. It also helps that she always blames one of the dogs, typically a stuffed one.

It's funny the stuff she thinks she needs to sneak. A couple weeks ago I stumbled upon her in the back bedroom, shamefully eating a graham cracker. We celebrate her willingly eating anything that isn't pure sucrose...