@zouros we lost the remote when my son was about the same age as yours. He was going through a 'posting phase'. After a couple of days we had a brainwave and went through the bin bags... he had posted it in the kitchen swing bin :(
Got a two year old and he on the odd occasion throws stuff in the bin or the sorts
Slipped down the side or back of the sofa between the cushions, under the sofa , fallen behind the tv stand ( unless the telly is wall mounted of course ) in which case ignore that.
Although we normally ask him a few times and then he goes off and gets the remote for us
It definitely isn't in the room that you were in when you thought you had lost it.
Have you searched the whole house? Bins, wastebaskets, dirty clothes baskets?
Sorry @GeekyPete I moved it and hid it under the floorboards in the back room along with the body...
My nephew posted our TV remote in the VCR. Do you have a VCR to check? (Does anyone other than me still have one...?!)
I have an XBMC HTPC :D It doesn't matter if we lose the remote we just then switch to our phones and use them instead! I can even do it from a computer!
I lost the remote for my LG Blu-Ray player for about a week. I managed to find an LG app on the Android app store to stand in for it until it turned up.