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Yes. The older Ipads a little more problematic, but newer Ipads, last few years, no problem.
Water is 10# per gallon. A 55-gallon barrel, (55x10=550#) 4 barrels is 550# x 4, or 2,200# The amount of water displaced (550# per barrel) is the amount of floatation provided. by an empty barrel.
Partially fill the barrels with water, put a little chlorox, maybe half a cup per barrel to keep the water fresh :)
Introduction to Ozobot Evo RoboticsView Instructable »