I'd love to relive the times when I was a baby up from my birth to when I was potty trained, while being consciously aware with my adult mind, but also completely feeling what my baby and toddler body felt.
My Mother, with 80s-style permed, curly hair wearing geek glasses breastfeeding me, bathing me, then creaming me up with Neogranormon, folding cloth diapers on me, and tying snibb PVC diaper covers on me with two cute bow tie knots at my sides, then putting me down for sleep, preferably next to her, and letting me suck her nipples to fall asleep.
All the casual times when I peed upwards like a fountain hitting her glasses with the stream, while a song like this played in the background through the radio:
https://www.youtube.com/watch?v=10JHwcMnTYU
Her teaching me to speak, and other basic things like shapes and numbers.
What she could've said as she cleaned me out of a poopy diaper, and found it very disgusting.
It would be such an interesting and emotional experience, which few people could remember normally due to Childhood Amnesia.