As Hex seeks the famous Fountain of Youth to restore his youth and thereby his magic, the Tennysons happen upon its presence by accident. Grandpa Max falls into a vat of it at a fair, splashing Ben. While their physical ages revert, so do their mental and behavioral ages, with Grandpa Max wanting to goof around all day while Ben becomes a whiny brat in need of a nap (with all his Omnitrix aliens becoming crabby little kids as well). Will it be enough to stop Hex from gaining the fountain? Written by
Did You Know?
This episode comes with extended opening title credits. See more
Potency of the age-reversing water is wildly uneven. Only a few drops revert Hex back ten or twenty years, but a splash of water reverts Ben back only six years, and immersion in gallons of the water only reverts Grandpa Max back about fifty years. See more
Who you calling old?
Ben meant "age-challenged."