Foolish Friday

Knock Knock !
Who's there ?
Ammonia.
Ammonia who ?
Ammonia little kid !

Caleb's drawing "Attack of the 50 foot caterpillar." Notice he put a bracket with 80 ft marked on the mushroom so you can compare it to the caterpillar. I'm not really sure what the thing is that the caterpillar is attacking. I think it might be an elephant. I believe he got the scale right.