I know! A horrendous act of forgetfulness if ever there was one!
Don't worry, I got them back by playing with some empty plastic bottles in the kitchen at 4am. What a great noise they made on the wooden floor as I rolled and batted them back and forth!
* R would like to point out that no Albie's were frightened by burst balloons in the first two photos. There was not even a flinch when the balloon burst, he just stared at the floor trying to figure out where the balloon had disappeared to.