Battery?

[GaryVoshol]

You build a box out of plywood in the corner of your crate. Into this box you put the batteries, packaged in their original cardboard. Then you screw the top onto the plywood box. Insert robot, close lid, attach shipping papers - you're good to go!

Or you can plop the batteries in the back of someone's car (without letting them wander around the trunk) and have them with you when you pull up into the parking lot of the venue. If you've been planning ahead, you might have even charged them up the night before - something you can't do when they're inside the crate.